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The Hella' Hard Half Trail Run

The Hella’ Hard Half Trail Run is a challenging 12.9-mile semi-loop with 3,050 feet of elevation gain and sweeping views of the California coastline.

View From Alta Vista TrailIn addition to the loop in San Pedro Valley County Park AND a trip to the summit of North Peak, the Hella’ Hard Half includes the infamous Alta Vista Trail, which climbs 1,200 feet in just over a mile and is, according to the San Francisco Chronicle's Outdoors writer, Tom Steinstra, “the steepest trail in the Bay Area, bar none!” The Alta Vista Trail was only recently officially opened for public use, and Parca is honored to be the first organization permitted to use the trail by the National Park Service for an organized athletic event.AltaVista2

Please note that the Hella' Hard Half Marathon route is more challenging than your average half marathon, and includes one mile of steep and rocky terrain which will be a hike for most people. The course is tough, but you will be rewarded with jaw-dropping panoramas of the San Mateo County coast, in addition to the all-you-can-eat lunch afterwards!

If you have specific questions about the course, please email us at: This email address is being protected from spambots. You need JavaScript enabled to view it..

There are three aid stations along the half marathon course at mile 2.4, 5.8, and 10.6. 

pdficon 2017 Half-Marathon Map/Cue Sheet 

Check our Check-In/Start Schedule page for starting times and additional details. You can also "Follow" the Devil's Slide Run on dedicated Twitter and Facebook pages to receive regular trail run updates. 

RegisterNow Rounded 2016 Run

  • The cutoff time for all trail run courses will be 2:00 PM. Past this time, course markings will start being removed and aid stations shut down.
  • All routes are subject to change based on CalTrans and local government requirements and/or weather conditions.