Boise River Marathon

Lace up for an unforgettable journey along Idaho's picturesque Boise River Greenbelt at the Boise River Marathon on May 2, 2026, in Eagle, ID. This event offers a distance for every runner, including a full Marathon (26.2M), Half Marathon (13.1M), 10K (6.2M), and 5K (3.1M). Known for its flat, fast, and remarkably scenic route, this race provides an excellent opportunity to chase a personal best or simply immerse yourself in the natural beauty of the region.

The course winds along the tranquil Boise River, offering stunning views of the waterway, local wildlife, and lush surrounding landscapes. While generally considered flat and ideal for speed, participants will encounter gentle rolling hills, particularly in the longer distances, with the marathon featuring an elevation gain of approximately 95 meters. Aid stations, conveniently located roughly every two miles, are well-stocked with water, electrolyte drinks like Gatorade, and GU gels, supported by friendly volunteers. Typical race day conditions in early May feature comfortable highs around 64°F and lows near 39°F, with only a 7% chance of precipitation, creating an inviting atmosphere for runners.

More than just a race, the Boise River Marathon is a celebration of fitness and the vibrant spirit of Boise, partnering with local businesses to support the community. Runners frequently praise the beautiful scenery and the ample, well-marked course, making it a favorite for those seeking a "low frills" yet rewarding race experience. Each finisher is awarded a medal, and participants receive a t-shirt hoodie, providing a lasting memento of their achievement. The start and finish lines are conveniently located at 235 E Colchester St, Eagle, ID, with plenty of free parking available.