Quad Rock 50 & 25 Mile
Course HighlightsThe Quad Rock 50 and 25 mile trail races take place entirely on the premium singletrack trails of Lory State Park and Horsetooth Mountain Park, just west of Fort Collins in the northeastern Colorado Rockies. The 25-mile course features three major climbs and descents totaling over 5,500 feet of vertical gain on 85% singletrack and 15% dirt road, running clockwise from Soldier Canyon. The 50-mile course runs the 25-mile loop twice in opposite directions, accumulating over 11,000 feet of
Telluride Mountain Run
Course HighlightsThe Telluride Mountain Run is one of the most visually spectacular mountain running events in the American West, set above the jaw-dropping box canyon town of Telluride in the heart of Colorado's San Juan Mountains. Runners navigate old mining roads, technical singletrack, and sweeping alpine tundra over mountain passes and exposed ridgelines, with portions of the course reaching above 13,000 feet. The 65-mile distance — new for 2026 — starts at 6:00 AM from Telluride Town Park and traverses
Vail Hill Climb
Course HighlightsThe Vail HillClimb is one of Colorado's most storied mountain running traditions, celebrating its 50th anniversary in 2026. The 12.2K (7.6-mile) course is a pure uphill race from the base of Vail Village at 8,160 feet to Mid-Vail at 10,254 feet — a relentless 2,128-foot climb. The route follows the same gravel and dirt service road that has been used since the race was founded in 1976, with 80% dirt/gravel and 20% paved sections. Runners work through dense spruce-fir
Aspen Backcountry Marathon
Course HighlightsThe Aspen Backcountry Marathon is one of Colorado's most stunning trail races, utilizing the world-class trail network that surrounds the legendary resort town of Aspen. All three distances — the 50K, marathon, and heavy half-marathon — run almost exclusively on single-track dirt trails with diverse terrain: challenging climbs through aspen groves, high ridge traverses with panoramic views of the Elk Mountains, and technical descents back into the valley. The 50K distance includes an out-and-back to the McNamara Hut, part
Imogene Pass Run
Course HighlightsThe Imogene Pass Run is the crown jewel of Colorado's San Juan mountain races. The 17.1-mile point-to-point course climbs from Ouray (7,792 feet) up a historic mining road to the summit of Imogene Pass at 13,114 feet — gaining over 5,300 feet — before plunging 4,800 feet down the other side to finish in the gorgeous mountain town of Telluride. The route passes abandoned mine shafts, crosses alpine tundra covered in late-season wildflowers, and rewards runners with panoramic views
Leadville Trail 100 Run
Course HighlightsThe Leadville Trail 100 Run — the Race Across the Sky — is the defining event of American ultrarunning. The 99.7-mile out-and-back course starts and finishes in Leadville, Colorado (10,152 feet, the highest incorporated city in the United States) and crosses the legendary Hope Pass twice at 12,500–12,600 feet, climbs the rugged Powerline section, traverses technical stretches of the Colorado Trail, and descends to the lowest point of 9,200 feet at Twin Lakes. The course accumulates 15,492 feet of
Pikes Peak Marathon & Ascent
Course HighlightsThe Pikes Peak Marathon and Ascent represent the gold standard of American mountain running. The Ascent covers 13.32 miles from downtown Manitou Springs (6,286 feet) to the 14,115-foot summit of Pikes Peak — America's most famous fourteener — gaining 7,867 feet in a single unrelenting climb over Barr Trail. The full Marathon adds the return trip, demanding runners descend the same brutal trail for a round-trip of 26.2 miles and 7,834 feet of gain and loss. The course passes
Perpetua Coast Trail Run
Course HighlightsThe Perpetua Coast trail races take place on the scenic headlands and rainforest trails around Cape Perpetua, Oregon's highest coastal viewpoint at 803 feet above sea level. The half marathon course is a gorgeous point-to-point route with 2,500 feet of elevation gain and 2,600 feet of descent, featuring miles of stunning old-growth rainforest singletrack, panoramic coastline views from the summit of Cape Perpetua, and rocky bluff paths skirting the shoreline near Yachats. The 50K and 20-miler offer even longer
Haulin Aspen Trail Marathon
Course HighlightsHaulin Aspen Trail Marathon & Half Marathon runs through the spectacular trail network surrounding Sunriver Resort and the Deschutes National Forest in Central Oregon. The course winds through golden aspen groves (at their most spectacular in late summer), old-growth ponderosa pine forests, and open meadows with sweeping views of the Three Sisters, Mount Bachelor, and Broken Top. The marathon and half marathon share the same scenic forest terrain, making this one of Central Oregon's premier late-summer trail experiences.Race DetailsThe
Crater Lake Rim Runs
Course HighlightsThe Crater Lake Rim Runs take place entirely along the rim of Crater Lake in Crater Lake National Park, one of America's most awe-inspiring natural landscapes. All three running distances and the walk option follow the paved Rim Drive — with the final four miles of the marathon on dirt and pumice cinder roads — at elevations ranging from 5,980 to 7,850 feet above sea level. The panoramic views of Crater Lake, formed by the collapse of ancient Mount