Trail landscape for Hardrock Hundred Endurance Run

Hardrock Hundred Endurance Run

100 miles·30,630 ft gain·Silverton, Colorado
Ultra100 MileMountainAlpineHigh AltitudeTechnicalLottery Entry

Photo by Demian Tejeda-Benitez on Unsplash

Distance100 miles
Gain30,630 ft
DateJul 10, 2026
StatusClosed
Fee$350
Difficulty5/5

Registration is closed for Hardrock Hundred Endurance Run

Get alerted if spots open up or when next year's registration goes live.

About This Race

A 100-mile loop through the San Juan Mountains of Colorado, crossing thirteen passes above 12,000 feet with a high point of 14,048 feet on Handies Peak. Hardrock demands mountaineering competence as much as running ability. The course never drops below 7,700 feet.

Hardrock is not a trail race in any conventional sense. Starting and finishing in Silverton, the loop traverses some of the most remote and exposed terrain in the Colorado Rockies. The thirteen major passes — most above 12,000 feet, several above 13,000 — require sustained effort at altitude where the air is thin and weather arrives fast. Handies Peak, the high point at 14,048 feet, is a legitimate fourteener summit. The descents are as demanding as the climbs: loose scree, steep snowfields, and rocky singletrack that punishes tired legs. Between passes, the route drops into mountain valleys along rushing creeks before climbing again. Stream crossings are frequent and can be thigh-deep during snowmelt. Navigation is part of the challenge — course markings are minimal by design, and runners are expected to carry maps and use them. The direction alternates each year (clockwise and counter-clockwise), and each direction presents its own character. This is a race for mountain people who happen to run, not runners who happen to be in the mountains.

Elevation Profile

The course gains 30,630 ft over 100 miles, with the steepest section between mile 62–mile 63.

Course Map

Route shown is approximate and for illustration purposes.

Aid Stations

6 stations along the course

Cunningham Gulch

Mile 5.8·10,000 ft
Crew AccessDrop Bags

water, food, medical

5h cutoff

Grouse Gulch

Mile 26.2·11,601 ft
Crew AccessDrop Bags

water, food, medical, soup

16h cutoff

Telluride

Mile 37.8·8,750 ft
Crew AccessDrop Bags

full aid, medical, hot food, cots

22h cutoff

Major crew point in town. Indoor aid station.

Ouray

Mile 54.3·7,700 ft
Crew AccessDrop Bags

full aid, medical, hot food, cots

30h cutoff

Major crew point. Hot springs nearby for recovery post-race.

Sherman

Mile 70.5·12,001 ft
Crew AccessDrop Bags

water, food, medical

38h cutoff

Maggie Gulch

Mile 87.8·11,401 ft

water, food

44h cutoff

Remote unmanned water station in some years

Race History

72%
Finish Rate

2024 Results

145

Starters

104

Finishers

23h 30m

Winning Time

39h

Median Time

Practical Info

Weather

Highly variable high-altitude conditions. Afternoon thunderstorms are common and can be severe above treeline. Night temperatures near freezing. Snow on passes is possible into July.

Nearest Airport

Durango (DRO) or Montrose (MTJ)

Accommodation

Silverton is a small mountain town with limited lodging. Book well in advance. Many runners camp or stay in nearby Ouray or Durango.

Required Gear
  • survival blanket
  • rain gear
  • warm layers
  • headlamp
  • map
  • compass
  • whistle

Best For

experienced mountain ultrarunnersrunners with mountaineering experiencethose comfortable with route-finding

Notable Features

Handies Peak 14er summit, alternating clockwise/counter-clockwise direction each year, stream crossings, minimal course markings