Infernal 50k

New this year! Are you up for the ultimate challenge? The Infernal 50k boasts more than 7,000 feet of climbing into this beautiful and very tough course. You will run through beautiful coastal vegetation, climb one of the steepest hills in Northern California (twice!), while enjoying spectacular views of the Pacific Ocean and San Francisco County.

Devil’s Dirty Thirty 30k

A true test of endurance, the Devil’s Dirty 30k packs a whopping 4,122 feet of climbing into this beautiful and tough 18.1-mile course. This 30k has it all: challenging climbs, long downhills and stellar views from some of the best trails on the San Francisco Peninsula.

Hella Hard Half Marathon

The Hella’ Hard Half Trail Run hurts so good — a challenging 12.5-mile semi-loop with 3,908 feet of elevation gain and sweeping views of the California coastline. It includes the infamous Alta Vista Trail, dubbed “the steepest trail in the Bay Area, bar none!” by the San Francisco Chronicle.


The Trail Runs are back—bigger, better, and “badder” than ever! We offer four routes, ranging in distance from 2.5 to 18.7 miles, which feature Pacifica’s best trails and scenery and designed to satisfy anyone from beginner hiker to the hard core trail junkie! This year we’re upping our game by introducing a new 30k route with a punishing 4,250′ of climbing. Whichever run you choose, we guarantee you’ll have a “devilishly” good time! Learn more about our Trail Runs…

Proceeds from the event directly benefit PARCA programs which enable people with developmental disabilities to live independently. Learn more about PARCA…


PARCA has been enriching the lives of people with developmental disabilities and their families since 1952. Learn how your participation supports our organization.

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Fast Facts

First time participant? Learn all you need to know about one of the best trail running races in Northern California.

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Partner With Us

From volunteering to sponsoring our event, there are plenty of opportunities to get involved and make a difference for PARCA’s clients.

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Evil Eleven 11k

The Evil 11k Trail Run is a fun and challenging 7.0-mile semi-loop with 1,639 feet of elevation gain. You’ll find love at first sight with views of the Pacific Ocean and the San Francisco Peninsula.


Fiery Four 4k

The Fiery 4k Trail Run/Hike is a moderate 2.6-mile loop with 629 feet of elevation gain in the lush and shaded San Pedro Valley County Park. If you are not running too fast, you may even catch sight of the seasonal Brooks Falls from the Brooks Creek Trail.



Corporate teams, triathlon and running clubs are welcome! Sign up as a group of five or more and receive special perks.

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Epic climbs, drop-dead views and best-in-class race support. See first-hand why you should sign up for the DSR today.

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Devil’s Slide Ride

Do you have friends or family members who prefer to ride on October 17? Visit our sister site, the Devil’s Slide Ride.

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The Devil's Slide Runs would simply not be possible without the generosity of our event Partners. Please support PARCA by supporting these businesses and organizations.