The Dirty Dog Trail Marathon and Half Marathon returns to Boise, Idaho on June 13th, marking its tenth year of challenging runners through the breathtaking Boise foothills along the Ridge to Rivers Trail System.
As participants lace up their shoes for this annual event, they’ll find themselves amidst a landscape that feels as much like home as it does an adventure. The race starts in the Military Reserve Flood Basin Dog Park and winds its way through trails known both for their steep ascents and thrilling descents. This year’s edition promises to be no different from past years, with runners encountering rugged terrain, single-track paths, and dirt roads that test endurance and agility alike. The air carries a hint of pine and sagebrush as the sun casts long shadows across the ridges during early June mornings.
Over the decade since its inception, the Dirty Dog Trail Marathon has become more than just an event; it’s a cornerstone tradition in Boise's running community. Each year sees hundreds of runners come together to tackle this grueling yet rewarding course. The race is renowned for its unique challenge: the first male and female to conquer the Hard Guy climb are greeted with a $100 bill at the summit, adding an exhilarating twist to the already demanding ascent. Aid stations along both marathon and half-marathon routes ensure that runners remain well-supported throughout their journey.
The course itself is a mix of challenging terrain, with the full marathon covering 42.2 kilometers through diverse sections including single-track trails and dirt roads. The half marathon, at 21.1 kilometers, offers similar challenges but on a more manageable scale for those new to trail racing or looking for an introduction to this thrilling format. Aid stations are strategically placed throughout both routes: four well-stocked aid points for the full course (at miles 4.5, 6.8, 14.5 and 21.5) and three for the half marathon route (located at miles 4.5, 6.8, and 8.9). Enthusiastic volunteers will be there to cheer runners on as they tackle each mile.
In early June in Boise, temperatures typically hover around an average of 20.8°C with a feel-like temperature that mirrors this moderate warmth thanks to the low humidity levels at about 38.9%. Runners should expect occasional breezes due to the area’s typical wind speed averaging 9.4 km/hour and can prepare for sunny conditions, often experiencing up to thirteen hours of daylight. The UV index is expected to be very high (8.0), making it crucial that participants protect their skin with sunscreen or coverings.
1/2 Marathon
21.1K • Start: 05:30:00 • Fee: $60.00
Marathon
42.2K • Start: 05:30:00 • Fee: $90.00
Registration for this year's Dirty Dog Trail Marathon and Half Marathon opens early online at https://ultrasignup.com/register.aspx?did=134699, where runners can secure their spot in either the 21.1K half marathon ($60) or the full 42.2K marathon ($90). Early bird discounts are available for those who register by May 30th to guarantee a race shirt.
Bib pickup will take place on June 12th from noon until 7 PM at the Military Reserve Flood Basin Dog Park, with an additional morning session starting early on race day from 6:30 AM. Participants must bring their photo ID and confirmation of payment for bib collection.
The start location is conveniently located within the Military Reserve Flood Basin Dog Park in Boise’s foothills. Age requirements are open to runners aged sixteen years or older due to safety regulations along trail routes. For first-time participants, it's important to arrive early on race day with plenty of water and snacks as well as appropriate gear for unpredictable weather conditions.
The Dirty Dog Trail Marathon and Half Marathon is more than just a run; it’s an invitation into the heart of Boise’s outdoor culture and community spirit. Join us in June to experience firsthand why this event remains one of Idaho's most beloved trail races, celebrating both individual achievement and collective camaraderie across scenic trails near Boise on June 13th, 2026.
