PCTR Race Series
Sycamore Canyon (Mar 29)
Skyline to the Sea (Apr 26)
Redwood Park (May 10)
Big Basin (May 17)
Forest Park (May 24)
Mount Diablo (Jun 6)
Lake Merritt (Jun 13)
Angel Island (Jun 20)
Pacifica (Jul 5)
Sequoia (Jul 18)
Salt Point (Jul 26)
Headlands 100 (Aug 8)
Montana de Oro (Aug 23)
Redwood Park (Sep 5)
Santa Cruz (Sep 27)
Muir Beach (Oct 3)
Carmel Valley (Oct 18)
SF One Day (Oct 24)
Stinson Beach (Nov 14)
Santa Monica (Nov 22)
Woodside (Dec 5)
Rodeo Beach (Dec 19)
Angel Island (Jan 10)
Pacifica (Jan 23)
Woodside (Feb 6)
Montana de Oro (Feb 14)
Sequoia (Feb 27)
Malibu Creek (Mar 7)
Pirates Cove (Mar 20)
Other Links

Click here for $5 Off Subscription


Marathon & 50 Mile Endurance Run 

Run-day Instructions



The Diablo Marathon & 50 Mile Endurance Run will start at 7:00 a.m. on Sunday, April 19th at Mitchell Canyon Trailhead.  Park entrance fee is $5 per vehicle.


From Walnut Creek, take Ygnacio Valley Rd. toward Clayton for 7 miles.  Turn right on Clayton Road.  Go 1 mile to Mitchell Canyon Road and turn right.  Follow Mitchell Canyon Road for 1.5 miles into the Park.  Click on the blue icon for more detailed driving directions.





Weather:  Clayton



The course will be marked with pink ribbon approximately every 1/4 mile.  The marathon course follows the 50-mile course to the Summit and, on the descent, follows Yellow ribbon directly to the Rock City aid station.  It then does a short out & back spur to Gibraltar Rock along "Trail Through Time" and returns along the 50-Mile course (pink) to the finish.


The most important course marking is the striped ribbon It indicates a turn at an intersection.  There will be at least two striped ribbons before a turn in the course.  The striped ribbons will be placed before and on the same side as the required turn.  As you approach an intersection, look for any striped ribbons before the turn.  Waiting until you're in the intersection to determine the correct direction may be confusing and you may go the wrong way.  After you complete the turn, there will be pink ribbons indicating the correct route.   Green glow sticks will be hung starting at the Summit aid station (mile 42).


If you don't see a pink ribbon or a glow stick for 10 minutes, you are off course.  If you get off course, you should retrace your path until you find where you left the course and then continue along the marked course.

Please be courteous on the trail. If you're passing another runner or hiker, announce "on your left" as you approach.

Headphones are allowed on dirt road sections only. Please do not wear headphones on single-track trail, while crossing paved roads, when getting aid at aid stations, or while crossing the finish line.

Many will finish in the dark.  Please plan on carrying a flashlight and a backup light on the final 8-mile section.


No dogs allowed on the course. Please don't leave pets in your vehicle.


            Marathon -   7,950'

            50 Mile     - 13,340'

              (Elevation changes determined using an Avocet altimeter.)


Aid Stations

Fully-stocked aid stations every 4 - 8 miles.  You can expect fresh fruit, salty snacks, assorted candy, boiled potatoes & salt, water, and Clif Shot Electrolyte sports drink. If you would like to be sure that you have Clif product, SaltStick capsules, or any other specific item at the event, you should carry it with you. Additionally, it is highly recommended that runners carry at least 20 oz. of water between aid stations. 




Aid Station Distance (mi) Next Aid Cut-off Crew Access Drop Bags
Juniper Campground  5.9 5.9   Yes Yes
Rock City 11.7 1.4   Yes Yes
Rock City 13.1 3.5   Yes Yes
Juniper Campground 16.6 1.6   Yes Yes
Summit 18.2 8.0   Yes No
Mitchell Canyon (Finish) 26.2        



50 Mile

Aid Station

Distance (mi)

Next Aid


Crew Access

Drop Bags

Juniper Campground  5.9 4.2    Yes Yes
Juniper Campground 10.1 4.2   Yes Yes
North Gate Road 14.3 5.0   Yes No
North Gate Road 19.3 5.2   Yes No
Rock City 24.5 6.2 2:30 p.m. Yes Yes
Finley Road 30.8 6.2   No No
Rock City 37.0 3.5 6:15 p.m. Yes Yes
Juniper Campground 40.5 1.6 7:45 p.m. Yes Yes
Summit 42.1 8.0   Yes No
Mitchell Canyon (Finish) 50.1   11:00 p.m.    


Drop Bags

We will have drop bags at Juniper (miles 6,10 & 40) and Rock City (miles 25 & 37) aid stations.  Prepare a bag(s) or container(s) with your items (flashlight, clothes, special food, etc.)  Put your name & aid station on the drop bags and we will take them to the aid stations for you.  We will transport your drop bags back to the finish at the end of the day.



Pacers are welcome after 25 miles and encouraged for the final 8-mile section.  Please use the PCTR Message Board to share rides.  Note that the main park entrances (i.e., access to Rock City, Juniper, & the Summit) close at sunset.


Post-Run Activities

There will be hot soup and chili at the finish line.

Patagonia Capilene shirts & tumbled marble coasters (50 Mile), and Dri-release shirts & coasters (Marathon) will be given to all finishers.  Awards will also be given to the first female and male finishers. 

We will have La Sportiva trail running shoes, Ultimate Direction bottles & packs, Clif Bar products, and PCTR merchandise available for purchase.


PCTR Race Series 

Participants are automatically included in the race series and points are awarded to the first 8 finishers in each age group.  To learn more, please click:  PCTR Race Series


Message Board

Please post messages regarding places to eat or stay, sharing rides with fellow runners, etc. on the:  PCTR Message Board


Check In

Please arrive 30 minutes prior to the start of your event on Sunday to check in and receive your bib number.    


Wendell and Sarah

[email protected]


© Copyright 2000-2009 Pacific Coast Trail Runs.  All rights reserved.