Our Trail of the Week feature is made possible through a partnership with Trail Run Project.

To give you a good idea of what Hardrock 100 competitors are up against this weekend in what is considered the hardest running race in North America, the Trail Run Project’s data provides an amazing glimpse.

The nearly 100.5-mile course that starts and ends in Silverton, Colo., climbs and descends roughly 33,000-plus feet, summits a 14er, and takes hardcore runners on an amazing-yet-humbling trek through four historic mining communities in the heart of the rugged San Juan Mountains. (Last year, a runner was struck by lightning near the top of 14,048-foot Handies peak and kept on running.)

Strava Pro and current Hardrock record-holder Kilian Jornet will attempt to repeat as champion at the Hardrock 100, a race with an average elevation higher than 11,000 feet above sea level. (Strava is challenging athletes to climb 5,000 meters, roughly 16,400 feet, in July—half of what Kilian and the other 150 competitors will take on in this legendary race in under 48 hours.)

While racers this weekend will try to tackle it all within 48 hours, this course has been spread out over four days and explored by less-intense runners (who dub it “Softrock 100”). If that’s more up your alley, beware still: Be ready for anything that a rugged mountain environment can or will throw at you—heat, cold, rain, snow, exposure, bears, lions, altitude related exhaustion and more.

PHOTOS: Images from the 2014 Hardrock 100

The Data

Miles: 100.5

Runnable: 73 percent

Singletrack: 90 percent

Average Grade: 12 percent

Max Grade: 88 percent

Total Ascent: 31,622

Total Descent: -31,636

Highest Elevation: 14,033 feet

For a closer look, check out the interactive map, data, photos and virtual run simulator courtesy of Trail Run Project: