10th Annual Dirty Dog Trail Marathon & Half
June 13 @ 5:30 am - 5:00 pm
The 10th annual Dirty Dog Trail Marathon and Half Marathon is scheduled for June 13, 2026, in the Boise, Idaho foothills, featuring challenging, single-track, and hilly terrain on the Ridge to Rivers Trail System. Registration opens on February 2, 2026, on Ultrasignup, according to the Dirty Dog Trail Marathon Facebook page.
Key Details for the 2026 Dirty Dog Trail Marathon:
-
- Date: Saturday, June 13, 2026
- Location: Boise, ID (Starts/Ends at Fort Boise)
- Course: Features steep climbs like “Hard Guy” and steep descents such as “Devil’s Slide”.
- Series: Part of the Idaho Trail Ultra Series (ITUS).
- Registration: Available on Ultrasignup beginning February 2, 2026.
- Dirty Dog 2026! The Dirty Dog Trail Marathon and Half Marathon races return for the 10th year in the Boise foothills on the spectacular Ridge to Rivers Trail System. The marathon course is challenging with big climbs and fast descents filled with lots of great single track. The first man and woman to reach the top of the Hard Guy climb will find a $100 bill waiting for them! The half marathon course is challenging yet great for a first time trail race. There is a combination of single track trails and some dirt road sections. There will be plenty of well stocked aid stations with enthusiastic volunteers. Come enjoy the amazing trails in our backyard here in Boise! Aid Stations for the Half Marathon are at miles 4.5, 6.8 and 8.9 and Aid Stations for the Full Marathon are at miles 4.5, 6.8, 14.5 and 21.5
