2025 - The Great River Challenge, Off-road Triathlon
2025 distances
Triathlon
Solo Triathlon Male Long Course
A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 5.5 miles. The Running leg is a challenging 4 miles of single track trails and in the woods followed by a 7.5 mile mtn bike on single track trails.
Solo Triathlon Female Long Course
A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 5.5 miles. The Running leg is a challenging 4 miles of single track trails and in the woods followed by a 7.5 mile mtn bike on single track trails.
2 Person Relay Team Triathlon Long Course
Teams must sign up together. A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 5.5 miles. The Running leg is a challenging 4 miles of single track trails and in the woods followed by a 7.5 mile mtn bike single track trails.
2 Person Junior (20 & under) Triathlon Long Course
Teams must sign up together. A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 5.5 miles. The Running leg is a challenging 4 miles of single track trails and in the woods followed by a 7.5 mile mtn bike single track trails.
3 Person Relay Team Triathlon Long Course
Teams must sign up together. A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 5.5 miles. The Running leg is a challenging 4 miles of single track trails and in the woods followed by a 7.5 mile mtn bike single track trails.
4 Person Relay Team Triathlon Long Course
Teams must sign up together. A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 5.5 miles. The Running leg is a challenging 4 miles of single track trails and in the woods followed by a 7.5 mile mtn bike single track trails.
3 Woman Relay Team Triathlon Long Course
Teams must sign up together. A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 5.5 miles. The Running leg is a challenging 4 miles of single track trails and in the woods followed by a 7.5 mile mtn bike single track trails.
Solo Triathlon Male Short Course
A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 4 miles. The Running leg is a challenging 2.5 miles of single track trails and in the woods followed by a 3.75 mile mtn bike on single track trails.
Solo Triathlon Female Short Course
A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 4 miles. The Running leg is a challenging 2.5 miles of single track trails and in the woods followed by a 3.75 mile mtn bike on single track trails.
Solo Triathlon SUP Short Course
A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 4 miles. The Running leg is a challenging 2.5 miles of single track trails and in the woods followed by a 3.75 mile mtn bike on single track trails.
Solo Junior Triathlon Short Course
A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 4 miles. The Running leg is a challenging 2.5 miles of single track trails and in the woods followed by a 3.75 mile mtn bike on single track trails.
2 Person Relay Team Triathlon Short Course
Teams must sign up together. A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 4 miles. The Running leg is a challenging 2.5 miles of single track trails and in the woods followed by a 3.75 mile mtn bike on single track trails.
3 Person Relay Team Triathlon Short Course
Teams must sign up together. A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 4 miles. The Running leg is a challenging 2.5 miles of single track trails and in the woods followed by a 3.75 mile mtn bike on single track trails.
3 Person Junior (20 & under) Triathlon Short Course
Teams must sign up together. A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 4 miles. The Running leg is a challenging 2.5 miles of single track trails and in the woods followed by a 3.75 mile mtn bike on single track trails.
4 Grand Master 70+ Relay Team Triathlon Short Course
Teams must sign up together. A canoe/kayak/SUP, trail run and mountain bike triathlon, the Great River Challenge will offer a hilly off-road course on fun trails at the Northfield Mtn Environmental and Recreation Center. The paddle leg will be a mass start on the Connecticut river, paddling out and back and around Captain Kidd's Island over 4 miles. The Running leg is a challenging 2.5 miles of single track trails and in the woods followed by a 3.75 mile mtn bike on single track trails.
Race date Weather
Conditions on October 4, 2025 — historical Open-Meteo data.
About Northfield
The Great River Challenge, Off-road Triathlon takes place in Northfield, Massachusetts, United States. The local timezone is America/New_York.
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Race information has been sourced from the event's official website and other publicly available resources. For the most up-to-date details, please refer to the official website directly. If you notice any incorrect or missing information, don't hesitate to reach out to us by email.