Sunset Trail Running Festival
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Sunset Trail Running Festival

Boulder, Colorado, United States View on map
Jun 21, 2026 (America/Denver local time)
Trail running

About this race

Join us on Sunday, June 21st, for the Sunset Trail Running Festival in Gold Hill, CO! Hosted by The Boulder Watershed Collective and in collaboration with T.E.A.M Boulder, all money raised from the event will be donated to the town of Gold Hill, and will fund wildfire preparation and response initiatives such as forest restoration, home hardening, emergency planning, land stewardship, and community resiliency.

This event provides an opportunity for the Front Range trail community, to show its support for small mountain town communities that live with a high risk of disruption and destruction from wildfire, while providing visitors with access to their unique character, beauty, and the surrounding landscapes.

RACE DETAILS
Runners can choose between a 28K (17.4M), 12K (7.7M), 5K, or Kids 1K trail race. All distances start and finish on the main street of Gold Hill at the Gold Hill Inn, and the longer distances are run, in part, on the National Forest System roads. Runners will enjoy varied terrain of dirt roads and trails through ponderosa pine and aspen forests while taking in amazing views on these challenging courses.

The 28K course heads south to Salina, and then west along Fourmile Canyon Dr to the historic town of Sunset. From there, runners will head north up the Switzerland Trail and back to Gold Hill. The 12K course heads west along Gold Hill Rd to the famous Mount Alto Picnic area and back into town.

  • NO Dogs are permitted in the race.
  • There are NO race refunds.

POST-RACE
After the race, celebrate the day with your family, friends, and fellow participants at our after race party! We will have food, drinks and music!

BUS TRANSPORTATION
To ensure minimal vehicle impact and disruption to the Gold Hill community on race day, we encourage all runners and spectators to utilize the shuttle bus to and from Boulder, leaving from Boulder County Justice Center (1777 6th St, Boulder, CO 80302). Parking at Gold Hill will be very limited, and the required cost per car will be a $30.00 cash donation.

PRICING - To Gold Hill and Return to Boulder.
Race Participants - FREE
Non Competing Adult - $10.00
Non Competing 13 - 19 years - $7.50
Non Competing 6 - 12 years - $5.00
Non Competing 5 years & under - FREE

BUS TIMETABLE -
Tickets are round-trip, and during the registration, you need to select a departing time for the bus trip up to Gold Hill, but you DO NOT need to select a return time back to Boulder.

BOULDER to GOLD HILL

  • Leave 6:00 AM - Arrive 6:30 AM
  • Leave 6:15 AM - Arrive 6:45 AM
  • Leave 7:00 AM - Arrive 7:30 AM
  • Leave 7:15 AM - Arrive 7:45 AM (LAST BUS)

GOLD HILL to BOULDER

  • Leave 10:15 AM - Arrive 10:45 AM
  • Leave 11:00 AM - Arrive 11:30 AM
  • Leave 11:45 AM - Arrive 12:15 PM
  • Leave 12:30 PM - Arrive 1:00 PM (LAST BUS)

Return buses will leave every 45mins from 10:15am until 12:30pm on a first come - first served basis.

Pick your distance

Trail running

28K

Jun 21, 2026 28K 7:30 AM
$80.00
Closed

12K

Jun 21, 2026 12K 8:15 AM
$55.00
Closed

5K

Jun 21, 2026 5K 8:00 AM
$45.00
Closed

Kids 1K

Jun 21, 2026 1K 8:30 AM
$25.00
Closed

Typical race-day weather

Based on 4 years of historical conditions on this event's race dates in Boulder.

Temp (°C)
Minimum temperature (race-day average) 14.7° / Maximum temperature (race-day average) 32.1°
Feels Like (°C)
Minimum feels like — heat index / wind chill (race-day average) 14.7° / Maximum feels like — heat index / wind chill (race-day average) 32.4°
Wind (km/h)
Average wind speed (race-day average)
15.3
Precip (mm)
Average precipitation (race-day average)
0.1mm
Humidity
Average relative humidity (race-day average)
40.3%

Course

Route map and elevation profile

No course map published yet.

The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.

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Different organizers, within 40 miles, in the next three months

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, 24 Boulder events

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