Trail ultramarathons in Idaho, United States

Continental Divide National Scenic Trail route, high-elevation mountain terrain, technical sections, skree fields, diverse climbs and descents

Backcountry courses in the Pioneer Mountains featuring rugged trails, steep ascents up to 11,000 feet, long aid station gaps, and alpine scenery

Nighttime out-and-back courses starting and finishing at Homedale Middle School, with a mix of paved and dirt roads through scenic countryside

1.1-mile loop with 240-foot climb and descent, rolling hills, and scenic views on private lavender farm; repeated eliminations every 20 minutes

Idaho wilderness trails with glimpses of civilization, curated course design, abundant wildlife, and a tranquil, uncrowded 50K experience near Island Park

Last person standing format on a 4.167-mile loop each hour, emphasizing endurance, mental grit, and camaraderie until only one runner remains.

Remote, demanding mountain ultramarathon starting and finishing at Jug Mountain Ranch, featuring rugged terrain and long stretches between aid stations

Rugged 50k trail featuring varied terrain through forests, open fields, and rolling hills with technical sections and scenic vistas

Challenging 50K mountain route through City of Rocks and Castle Rocks, single-track trails, 1,500-foot climb, granite spires, panoramic summit views

Boise Foothills course featuring favorite local trails, starting and finishing at Military Reserve, 50 miles through scenic Idaho landscapes

Diverse terrain from dense forests to alpine areas, steep climbs and demanding descents, 7,000 feet of elevation gain, reaching 8,550 feet high point

Challenging 50k on technical single-track and logging roads along Moscow Mountain, featuring significant elevation and Palouse vistas.

Scenic loop course through Ponderosa State Park, featuring accessible trail terrain and a community-focused atmosphere

Rugged Idaho trail 50K with singletrack, double track, gravel road, about 6,000 ft of gain, and the climb to Prospector Peak.

Rugged winter trails with unpredictable weather, extreme terrain, sparse aid stations, and self-reliant course requirements for experienced runners

Flat, scenic dirt trail loop at Eagle Island State Park near Boise, Idaho

Sand, volcanic rock, slick rock, and sagebrush terrain on the North Menan Butte, rim traverses and core descents amid captivating geological features.

50-kilometer point-to-point course from Council to Midvale along the Weiser River Trail, featuring river views, rugged canyons, and open farmland

13,000 feet of elevation gain across wild, scenic terrain with major climbs and rolling canyon sections; limited aid stations and required gear kit

Demanding 50- and 100-mile mountain routes over Scout Mountain, with tough climbs, rugged scenery, and high-country terrain in southeast Idaho.