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The Avenue of the Giants Marathon, Half Marathon & 10K

Quick facts

Distance Marathon

Rescheduled to 11 Oct 2020

Previous date: 03 May 2020

About The Avenue of the Giants Marathon, Half Marathon & 10K

The first of two running events that take place among the majestic redwood forests of California’s Humboldt Redwoods State Park, the Avenue of the Giants Marathon offers much of the same breathtaking scenery as its autumn counterpart, along a course once described by Runner’s World as one of the nation’s most beautiful running routes.

The course is a double out and back entirely on paved roads. The roads are lined with 300 feet tall old growth Redwood trees. While these provide shade and keep temperatures cool all morning, please note that they sometimes block out GPS signal on running watches.

We’re proud to be an independently GREEN organization and one of the few remaining marathons not associated with corporate sponsors.



  • 42.195km


  • 10km

Half Marathon

  • 21.097km


Aid Stations

Gatorade, oranges, and bananas will be served at all aid stations. Aid stations will be at mile 2, 4, 6, 7, 9, 11, 14, 16.5, 17.5, 19, 22, 24, and 25.5. Power bars or Gel will be at select aid stations.

Award Medals

Finishing Medals are given to all participants finishing within the allotted time.

Maximum Time

7 hours time limit.


On the river bar 1/4 mile from the start. Be sure to allow plenty of time, traffic can back up close to the start time.


The underpass where Bull Creek Flats Road meets Hwy 101 and the Avenue of the Giants



The Avenue of the Giants Marathon is one of the most scenic courses in the country. Staged on 'The Avenue of the Giants' in Humboldt Redwoods State Park, located in rural Northern California, the paved course winds through giant old growth redwoods.


The marathon course is a double out and back of the half marathon course which is entirely on paved roads.

Heading south along the Avenue of the Giants (Highway 254), all the way along six and a half miles of paved roads to the turnaround point near Hammond Grove and Truss Creek, where runners then make the turn and retrace their steps back toward the start.

All along the course, which starts out flat for roughly the first mile and then becomes hillier and more challenging as runners move into the middle miles of the race, the scenery changes from a mix of redwoods to wide open spaces.

There, you can get a glimpse of the majesty of the surrounding mountains, and back again to canopies of redwoods overhead. Organizers say that even in the non-shaded portions of the course, the elevation and the season of year combine to provide cool temperatures in most years along the entire race course.

Runners will encounter three aid stations along the course and should expect a course that climbs gradually but steadily over the first half of the race, and then descends slowly and steadily along the last part of the race to the finish line at the Dyersville Bridge.

The race information has been found on the official website of the event or through publicly available sources. Always refer to the official website the latest race information. Please let us know if any data is wrong or missing, by emailing us.