Dirty Dog Trail Marathon and Half Marathon

Prepare for an unforgettable trail running adventure at the Dirty Dog Trail Marathon and Half Marathon in Boise, ID, on June 13, 2026. Celebrating its tenth year, this popular event takes runners through the spectacular Ridge to Rivers Trail System, offering a true taste of Boise's scenic foothills. Both the marathon and half marathon courses feature a dynamic mix of challenging single-track trails and dirt road sections, starting and ending at Fort Boise. Marathoners will tackle significant climbs and thrilling descents, including the notorious "Hard Guy" climb, where the first man and woman to reach the top are rewarded with a $100 prize. The half marathon provides a similarly engaging experience, considered challenging yet suitable for first-time trail racers.

Runners can expect well-supported courses with enthusiastic volunteers manning aid stations strategically placed throughout. Half marathon aid stations are located at miles 4.5, 6.8, and 8.9, while full marathoners will find support at miles 4.5, 6.8, 14.5, and 21.5. Typical race day conditions in mid-June in Boise bring highs around 81F and lows near 54F, with a minimal 4% chance of precipitation, creating ideal weather for tackling the trails. A portion of the race proceeds benefits the Ridge to Rivers Trail System and the local Humane Society, allowing participants to enjoy breathtaking scenery while contributing to a great cause. Get ready to conquer the trails and experience the vibrant spirit of trail running in the heart of Idaho.