MileBuilt Gemini Springs 2-Day Challenge
About this race
THE RACE
The Gemini Springs 2-Day Challenge runs on Spring-to-Spring Trail/Pat Northey Pathway in DeBary, FL on January 23-24, 2027. An out-and-back on an accessible, measured trail. Palm hammock, live oak, and cypress. A tunnel of trees. Every repeat brings you back to the O.K. Corral for aid and to begin another out-and-back. It gets familiar real quick. That is the point.
Five distances: 5K · 10K · Half Marathon · Marathon · 50K. Core distances run both days. 50K is confirmed for this event.
START TIMES
7:00 AM — Marathon and 50K
7:10 AM — Half Marathon
8:00 AM — 5K and 10K
RACE DAY CUTOFF
4:00 PM. This applies to the full race day — not per distance. Runners still on course after the cutoff will be directed off course.
PARKING
To reach the O.K. Corral parking lot, turn left into the main entrance of Gemini Springs Park from Dirksen Drive. Follow the main park road, and when the road splits, stay to the left. This lane guides you directly into the West Parking Lot, which sits adjacent to the dog park and the O.K. Corral pavilion
AID STATION
Cupless event. Carry your own fluids — handheld bottle, vest, or waist pack. MileBuilt provides water, an electrolyte drink, and basic snacks. Do not rely on the aid station as your complete nutrition plan, especially for longer distances or multi-day participation.
BIB PICKUP
Available on race day beginning one hour before your scheduled start time — honor system, no ID required. A friend may pick up on your behalf. No bib transfers.
BARE-BONES EVENT
No shirts. No race bags. No expo.
FINISH
Not chip timed. When you finish: cross the line, strike the GONG, then complete the Clock Out at the MileBuilt Time Clock. Official finish times are recorded at the MileBuilt Time Clock and verified by the Race Director before results are posted. Every runner must complete the Clock Out process to receive an official finish record.
Pick your distance
Trail running
50K - Day 1 (Saturday)
The Course The Gemini Springs 2-Day Challenge runs on the Spring-to-Spring Trail / Pat Northey Pathway in DeBary, FL. The course starts and finishes at the O.K. Corral pavilion at Gemini Springs Park. Every distance follows the same modified out-and-back route — out along the trail to a marked turnaround and back. Every repeat brings you back to the O.K. Corral for aid, then sends you out again. Oak and palm hammock overhead nearly the whole way. It gets familiar real quick. That is the point. Runners may access their own vehicle if parked along the course. Distances and Start Times 7:00 AM — Marathon and 50K 7:10 AM — Half Marathon 8:00 AM — 5K and 10K Available distances: 5K · 10K · Half Marathon · Marathon · 50K Parking Gemini Springs Park, 37 Dirksen Drive, DeBary, FL 32713. Turn left into the main park entrance from Dirksen Drive, follow the main park road, and stay left where the road splits. That lane leads directly into the West Parking Lot, adjacent to the dog park and the O.K. Corral pavilion. Race Day Cutoff Race day cutoff: 4:00 PM. This applies to the full race day — not per distance. Runners still on course after the cutoff will be directed off course. Aid Station This is a cupless event. Carry your own fluids — handheld bottle, vest, or waist pack. MileBuilt provides water, an electrolyte drink, and basic snacks at the aid station. Do not rely on the aid station as your complete nutrition plan, especially for longer distances or multi-day participation. Bib Pickup Bibs are available for pickup on race day beginning one hour before your scheduled start time — honor system, no ID required. A friend may pick up your bib on your behalf. No bib transfers — your bib is registered to you. Finish Not chip timed. When you finish: cross the line, strike the GONG, then complete the Clock Out at the MileBuilt Time Clock. Official finish times are recorded at the MileBuilt Time Clock and verified by the Race Director before results are posted. Every runner must complete the Clock Out process to receive an official finish record.
50K - Day 2 (Sunday)
The Course The Gemini Springs 2-Day Challenge runs on the Spring-to-Spring Trail / Pat Northey Pathway in DeBary, FL. The course starts and finishes at the O.K. Corral pavilion at Gemini Springs Park. Every distance follows the same modified out-and-back route — out along the trail to a marked turnaround and back. Every repeat brings you back to the O.K. Corral for aid, then sends you out again. Oak and palm hammock overhead nearly the whole way. It gets familiar real quick. That is the point. Runners may access their own vehicle if parked along the course. Distances and Start Times 7:00 AM — Marathon and 50K 7:10 AM — Half Marathon 8:00 AM — 5K and 10K Available distances: 5K · 10K · Half Marathon · Marathon · 50K Parking Gemini Springs Park, 37 Dirksen Drive, DeBary, FL 32713. Turn left into the main park entrance from Dirksen Drive, follow the main park road, and stay left where the road splits. That lane leads directly into the West Parking Lot, adjacent to the dog park and the O.K. Corral pavilion. Race Day Cutoff Race day cutoff: 4:00 PM. This applies to the full race day — not per distance. Runners still on course after the cutoff will be directed off course. Aid Station This is a cupless event. Carry your own fluids — handheld bottle, vest, or waist pack. MileBuilt provides water, an electrolyte drink, and basic snacks at the aid station. Do not rely on the aid station as your complete nutrition plan, especially for longer distances or multi-day participation. Bib Pickup Bibs are available for pickup on race day beginning one hour before your scheduled start time — honor system, no ID required. A friend may pick up your bib on your behalf. No bib transfers — your bib is registered to you. Finish Not chip timed. When you finish: cross the line, strike the GONG, then complete the Clock Out at the MileBuilt Time Clock. Official finish times are recorded at the MileBuilt Time Clock and verified by the Race Director before results are posted. Every runner must complete the Clock Out process to receive an official finish record.
Running
Marathon - Day 1 (Saturday)
The Course The Gemini Springs 2-Day Challenge runs on the Spring-to-Spring Trail / Pat Northey Pathway in DeBary, FL. The course starts and finishes at the O.K. Corral pavilion at Gemini Springs Park. Every distance follows the same modified out-and-back route — out along the trail to a marked turnaround and back. Every repeat brings you back to the O.K. Corral for aid, then sends you out again. Oak and palm hammock overhead nearly the whole way. It gets familiar real quick. That is the point. Runners may access their own vehicle if parked along the course. Distances and Start Times 7:00 AM — Marathon and 50K 7:10 AM — Half Marathon 8:00 AM — 5K and 10K Available distances: 5K · 10K · Half Marathon · Marathon · 50K Parking Gemini Springs Park, 37 Dirksen Drive, DeBary, FL 32713. Turn left into the main park entrance from Dirksen Drive, follow the main park road, and stay left where the road splits. That lane leads directly into the West Parking Lot, adjacent to the dog park and the O.K. Corral pavilion. Race Day Cutoff Race day cutoff: 4:00 PM. This applies to the full race day — not per distance. Runners still on course after the cutoff will be directed off course. Aid Station This is a cupless event. Carry your own fluids — handheld bottle, vest, or waist pack. MileBuilt provides water, an electrolyte drink, and basic snacks at the aid station. Do not rely on the aid station as your complete nutrition plan, especially for longer distances or multi-day participation. Bib Pickup Bibs are available for pickup on race day beginning one hour before your scheduled start time — honor system, no ID required. A friend may pick up your bib on your behalf. No bib transfers — your bib is registered to you. Finish Not chip timed. When you finish: cross the line, strike the GONG, then complete the Clock Out at the MileBuilt Time Clock. Official finish times are recorded at the MileBuilt Time Clock and verified by the Race Director before results are posted. Every runner must complete the Clock Out process to receive an official finish record.
Half Marathon - Day 1 (Saturday)
The Course The Gemini Springs 2-Day Challenge runs on the Spring-to-Spring Trail / Pat Northey Pathway in DeBary, FL. The course starts and finishes at the O.K. Corral pavilion at Gemini Springs Park. Every distance follows the same modified out-and-back route — out along the trail to a marked turnaround and back. Every repeat brings you back to the O.K. Corral for aid, then sends you out again. Oak and palm hammock overhead nearly the whole way. It gets familiar real quick. That is the point. Runners may access their own vehicle if parked along the course. Distances and Start Times 7:00 AM — Marathon and 50K 7:10 AM — Half Marathon 8:00 AM — 5K and 10K Available distances: 5K · 10K · Half Marathon · Marathon · 50K Parking Gemini Springs Park, 37 Dirksen Drive, DeBary, FL 32713. Turn left into the main park entrance from Dirksen Drive, follow the main park road, and stay left where the road splits. That lane leads directly into the West Parking Lot, adjacent to the dog park and the O.K. Corral pavilion. Race Day Cutoff Race day cutoff: 4:00 PM. This applies to the full race day — not per distance. Runners still on course after the cutoff will be directed off course. Aid Station This is a cupless event. Carry your own fluids — handheld bottle, vest, or waist pack. MileBuilt provides water, an electrolyte drink, and basic snacks at the aid station. Do not rely on the aid station as your complete nutrition plan, especially for longer distances or multi-day participation. Bib Pickup Bibs are available for pickup on race day beginning one hour before your scheduled start time — honor system, no ID required. A friend may pick up your bib on your behalf. No bib transfers — your bib is registered to you. Finish Not chip timed. When you finish: cross the line, strike the GONG, then complete the Clock Out at the MileBuilt Time Clock. Official finish times are recorded at the MileBuilt Time Clock and verified by the Race Director before results are posted. Every runner must complete the Clock Out process to receive an official finish record.
10K - Day 1 (Saturday)
The Course The Gemini Springs 2-Day Challenge runs on the Spring-to-Spring Trail / Pat Northey Pathway in DeBary, FL. The course starts and finishes at the O.K. Corral pavilion at Gemini Springs Park. Every distance follows the same modified out-and-back route — out along the trail to a marked turnaround and back. Every repeat brings you back to the O.K. Corral for aid, then sends you out again. Oak and palm hammock overhead nearly the whole way. It gets familiar real quick. That is the point. Runners may access their own vehicle if parked along the course. Distances and Start Times 7:00 AM — Marathon and 50K 7:10 AM — Half Marathon 8:00 AM — 5K and 10K Available distances: 5K · 10K · Half Marathon · Marathon · 50K Parking Gemini Springs Park, 37 Dirksen Drive, DeBary, FL 32713. Turn left into the main park entrance from Dirksen Drive, follow the main park road, and stay left where the road splits. That lane leads directly into the West Parking Lot, adjacent to the dog park and the O.K. Corral pavilion. Race Day Cutoff Race day cutoff: 4:00 PM. This applies to the full race day — not per distance. Runners still on course after the cutoff will be directed off course. Aid Station This is a cupless event. Carry your own fluids — handheld bottle, vest, or waist pack. MileBuilt provides water, an electrolyte drink, and basic snacks at the aid station. Do not rely on the aid station as your complete nutrition plan, especially for longer distances or multi-day participation. Bib Pickup Bibs are available for pickup on race day beginning one hour before your scheduled start time — honor system, no ID required. A friend may pick up your bib on your behalf. No bib transfers — your bib is registered to you. Finish Not chip timed. When you finish: cross the line, strike the GONG, then complete the Clock Out at the MileBuilt Time Clock. Official finish times are recorded at the MileBuilt Time Clock and verified by the Race Director before results are posted. Every runner must complete the Clock Out process to receive an official finish record.
5K - Day 1 (Saturday)
The Course The Gemini Springs 2-Day Challenge runs on the Spring-to-Spring Trail / Pat Northey Pathway in DeBary, FL. The course starts and finishes at the O.K. Corral pavilion at Gemini Springs Park. Every distance follows the same modified out-and-back route — out along the trail to a marked turnaround and back. Every repeat brings you back to the O.K. Corral for aid, then sends you out again. Oak and palm hammock overhead nearly the whole way. It gets familiar real quick. That is the point. Runners may access their own vehicle if parked along the course. Distances and Start Times 7:00 AM — Marathon and 50K 7:10 AM — Half Marathon 8:00 AM — 5K and 10K Available distances: 5K · 10K · Half Marathon · Marathon · 50K Parking Gemini Springs Park, 37 Dirksen Drive, DeBary, FL 32713. Turn left into the main park entrance from Dirksen Drive, follow the main park road, and stay left where the road splits. That lane leads directly into the West Parking Lot, adjacent to the dog park and the O.K. Corral pavilion. Race Day Cutoff Race day cutoff: 4:00 PM. This applies to the full race day — not per distance. Runners still on course after the cutoff will be directed off course. Aid Station This is a cupless event. Carry your own fluids — handheld bottle, vest, or waist pack. MileBuilt provides water, an electrolyte drink, and basic snacks at the aid station. Do not rely on the aid station as your complete nutrition plan, especially for longer distances or multi-day participation. Bib Pickup Bibs are available for pickup on race day beginning one hour before your scheduled start time — honor system, no ID required. A friend may pick up your bib on your behalf. No bib transfers — your bib is registered to you. Finish Not chip timed. When you finish: cross the line, strike the GONG, then complete the Clock Out at the MileBuilt Time Clock. Official finish times are recorded at the MileBuilt Time Clock and verified by the Race Director before results are posted. Every runner must complete the Clock Out process to receive an official finish record.
Marathon - Day 2 (Sunday)
The Course The Gemini Springs 2-Day Challenge runs on the Spring-to-Spring Trail / Pat Northey Pathway in DeBary, FL. The course starts and finishes at the O.K. Corral pavilion at Gemini Springs Park. Every distance follows the same modified out-and-back route — out along the trail to a marked turnaround and back. Every repeat brings you back to the O.K. Corral for aid, then sends you out again. Oak and palm hammock overhead nearly the whole way. It gets familiar real quick. That is the point. Runners may access their own vehicle if parked along the course. Distances and Start Times 7:00 AM — Marathon and 50K 7:10 AM — Half Marathon 8:00 AM — 5K and 10K Available distances: 5K · 10K · Half Marathon · Marathon · 50K Parking Gemini Springs Park, 37 Dirksen Drive, DeBary, FL 32713. Turn left into the main park entrance from Dirksen Drive, follow the main park road, and stay left where the road splits. That lane leads directly into the West Parking Lot, adjacent to the dog park and the O.K. Corral pavilion. Race Day Cutoff Race day cutoff: 4:00 PM. This applies to the full race day — not per distance. Runners still on course after the cutoff will be directed off course. Aid Station This is a cupless event. Carry your own fluids — handheld bottle, vest, or waist pack. MileBuilt provides water, an electrolyte drink, and basic snacks at the aid station. Do not rely on the aid station as your complete nutrition plan, especially for longer distances or multi-day participation. Bib Pickup Bibs are available for pickup on race day beginning one hour before your scheduled start time — honor system, no ID required. A friend may pick up your bib on your behalf. No bib transfers — your bib is registered to you. Finish Not chip timed. When you finish: cross the line, strike the GONG, then complete the Clock Out at the MileBuilt Time Clock. Official finish times are recorded at the MileBuilt Time Clock and verified by the Race Director before results are posted. Every runner must complete the Clock Out process to receive an official finish record.
Half Marathon - Day 2 (Sunday)
The Course The Gemini Springs 2-Day Challenge runs on the Spring-to-Spring Trail / Pat Northey Pathway in DeBary, FL. The course starts and finishes at the O.K. Corral pavilion at Gemini Springs Park. Every distance follows the same modified out-and-back route — out along the trail to a marked turnaround and back. Every repeat brings you back to the O.K. Corral for aid, then sends you out again. Oak and palm hammock overhead nearly the whole way. It gets familiar real quick. That is the point. Runners may access their own vehicle if parked along the course. Distances and Start Times 7:00 AM — Marathon and 50K 7:10 AM — Half Marathon 8:00 AM — 5K and 10K Available distances: 5K · 10K · Half Marathon · Marathon · 50K Parking Gemini Springs Park, 37 Dirksen Drive, DeBary, FL 32713. Turn left into the main park entrance from Dirksen Drive, follow the main park road, and stay left where the road splits. That lane leads directly into the West Parking Lot, adjacent to the dog park and the O.K. Corral pavilion. Race Day Cutoff Race day cutoff: 4:00 PM. This applies to the full race day — not per distance. Runners still on course after the cutoff will be directed off course. Aid Station This is a cupless event. Carry your own fluids — handheld bottle, vest, or waist pack. MileBuilt provides water, an electrolyte drink, and basic snacks at the aid station. Do not rely on the aid station as your complete nutrition plan, especially for longer distances or multi-day participation. Bib Pickup Bibs are available for pickup on race day beginning one hour before your scheduled start time — honor system, no ID required. A friend may pick up your bib on your behalf. No bib transfers — your bib is registered to you. Finish Not chip timed. When you finish: cross the line, strike the GONG, then complete the Clock Out at the MileBuilt Time Clock. Official finish times are recorded at the MileBuilt Time Clock and verified by the Race Director before results are posted. Every runner must complete the Clock Out process to receive an official finish record.
10K - Day 2 (Sunday)
The Course The Gemini Springs 2-Day Challenge runs on the Spring-to-Spring Trail / Pat Northey Pathway in DeBary, FL. The course starts and finishes at the O.K. Corral pavilion at Gemini Springs Park. Every distance follows the same modified out-and-back route — out along the trail to a marked turnaround and back. Every repeat brings you back to the O.K. Corral for aid, then sends you out again. Oak and palm hammock overhead nearly the whole way. It gets familiar real quick. That is the point. Runners may access their own vehicle if parked along the course. Distances and Start Times 7:00 AM — Marathon and 50K 7:10 AM — Half Marathon 8:00 AM — 5K and 10K Available distances: 5K · 10K · Half Marathon · Marathon · 50K Parking Gemini Springs Park, 37 Dirksen Drive, DeBary, FL 32713. Turn left into the main park entrance from Dirksen Drive, follow the main park road, and stay left where the road splits. That lane leads directly into the West Parking Lot, adjacent to the dog park and the O.K. Corral pavilion. Race Day Cutoff Race day cutoff: 4:00 PM. This applies to the full race day — not per distance. Runners still on course after the cutoff will be directed off course. Aid Station This is a cupless event. Carry your own fluids — handheld bottle, vest, or waist pack. MileBuilt provides water, an electrolyte drink, and basic snacks at the aid station. Do not rely on the aid station as your complete nutrition plan, especially for longer distances or multi-day participation. Bib Pickup Bibs are available for pickup on race day beginning one hour before your scheduled start time — honor system, no ID required. A friend may pick up your bib on your behalf. No bib transfers — your bib is registered to you. Finish Not chip timed. When you finish: cross the line, strike the GONG, then complete the Clock Out at the MileBuilt Time Clock. Official finish times are recorded at the MileBuilt Time Clock and verified by the Race Director before results are posted. Every runner must complete the Clock Out process to receive an official finish record.
5K - Day 2 (Sunday)
The Course The Gemini Springs 2-Day Challenge runs on the Spring-to-Spring Trail / Pat Northey Pathway in DeBary, FL. The course starts and finishes at the O.K. Corral pavilion at Gemini Springs Park. Every distance follows the same modified out-and-back route — out along the trail to a marked turnaround and back. Every repeat brings you back to the O.K. Corral for aid, then sends you out again. Oak and palm hammock overhead nearly the whole way. It gets familiar real quick. That is the point. Runners may access their own vehicle if parked along the course. Distances and Start Times 7:00 AM — Marathon and 50K 7:10 AM — Half Marathon 8:00 AM — 5K and 10K Available distances: 5K · 10K · Half Marathon · Marathon · 50K Parking Gemini Springs Park, 37 Dirksen Drive, DeBary, FL 32713. Turn left into the main park entrance from Dirksen Drive, follow the main park road, and stay left where the road splits. That lane leads directly into the West Parking Lot, adjacent to the dog park and the O.K. Corral pavilion. Race Day Cutoff Race day cutoff: 4:00 PM. This applies to the full race day — not per distance. Runners still on course after the cutoff will be directed off course. Aid Station This is a cupless event. Carry your own fluids — handheld bottle, vest, or waist pack. MileBuilt provides water, an electrolyte drink, and basic snacks at the aid station. Do not rely on the aid station as your complete nutrition plan, especially for longer distances or multi-day participation. Bib Pickup Bibs are available for pickup on race day beginning one hour before your scheduled start time — honor system, no ID required. A friend may pick up your bib on your behalf. No bib transfers — your bib is registered to you. Finish Not chip timed. When you finish: cross the line, strike the GONG, then complete the Clock Out at the MileBuilt Time Clock. Official finish times are recorded at the MileBuilt Time Clock and verified by the Race Director before results are posted. Every runner must complete the Clock Out process to receive an official finish record.
Course
Route map and elevation profile
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Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 21 DeBary events
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