A legendary 100-mile mountain challenge through the heart of Colorado’s San Juan peaks
Overview
The Hardrock Hundred Endurance Run is one of the most iconic ultramarathons in the world. It is more than a race, it is a rite of passage in the high country. Runners travel through rugged alpine terrain, historic mining towns, and some of the most breathtaking landscapes on earth while testing their endurance, grit, and spirit.
The race is known for its wild beauty, its extreme altitude, and its tradition of finishing by kissing the painted ram’s head on a block of mining stone in Silverton. Hardrock draws a global community of athletes, volunteers, and adventurers who come together each July to celebrate the mountains and the toughness it takes to traverse them.
Course
The Hardrock 100 is a loop through the San Juan Mountains that starts and ends in Silverton, Colorado. The 102.5M route passes through the towns of Telluride, Ouray, and the ghost town of Sherman, crossing thirteen major passes between 12,000ft and 13,000ft. The highest point is the 14,048ft summit of Handies Peak.
The terrain is wild and unforgiving, with long climbs, high exposure, steep scree, boulder fields, and snow crossings. Weather can shift in minutes, turning sunshine into thunderstorms, hail, or snow. At times runners wade through icy rivers, scramble over rocks, and move under skies crackling with lightning. Wildlife is common, from elk in alpine meadows to the rare mountain lion sighting.
This course is not just about running; it is about mountaineering, wilderness survival, and perseverance. Those who finish will have traversed alpine tundra, lush forests, ghost towns, and ridge lines that seem to touch the sky.
Cutoff Details
Aid Stations
There are 15 aid stations along the course, from full-service major hubs in towns like Ouray and Telluride to rugged backcountry posts at high passes. Aid stations provide hot food, hydration, shelter, medical staff, and volunteer crews who care deeply for every runner. Many stations feature off-menu specialties unique to Hardrock. Runners can expect hearty meals, soups, Tailwind, and classic ultra fare to power them through long mountain stretches. Drop bags are available at designated stations, and radio operators track runner safety.
Getting There
Policies
Charity & Beneficiary
Hardrock supports San Juan community organizations, Silverton Medical Rescue, and the Joel Zucker Memorial Scholarship, which provides funds to local high school and continuing education students.
Land Acknowledgement
The Hardrock 100 course crosses the ancestral homelands of the Ute, Puebloan, and Diné people. We honor their history, presence, and stewardship of these lands and commit to running with respect.
About Hardrock Hundred Run Board
Disclaimer
We make every effort to provide accurate and up-to-date information on Kåduka, but details may change. Please always confirm the latest information on the official race website. See something that needs correcting? Send us a note at [email protected]