The Hella’ Hard Half Trail Run is a challenging 12.5-mile semi-loop with 3,908 feet of elevation gain and sweeping views of the California coastline.

In 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 opened to public use only a few years ago, and PARCA was honored to be the first organization permitted to use the trail by the National Park Service for an organized athletic event.

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

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

Check our Race Day Schedule & Parking for starting times and additional details. You can also Follow us on Twitter and Facebook.


  • The cutoff time for all trail run courses will be 3:00 PM. Past this time, course markings will be removed and aid stations shut down.
  • All routes are subject to change based on CalTrans and local government requirements and/or weather conditions