2026 Humboldt Redwoods Marathon, Half Marathon, 5K

The Humboldt Redwoods Marathon, Half Marathon, and 5K begin and end near the Dyerville Bridge overlook by Avenue of the Giants in Redcrest, California. These races take place on the second Sunday of October, utilizing a paved-road course within Humboldt Redwoods country, with old-growth redwoods lining much of the route. The marathon course is certified and qualifies for the Boston Marathon. The road includes gentle uphill sections, but the profile is largely flat and fast, appealing to runners aiming for a personal best as well as those appreciating the forest setting. On race day, Avenue of the Giants and Bull Creek Road are closed to traffic mid-day, with vehicles detoured via Highway 101 exits north of the start and finish, bypassing the Honeydew, South Fork Eel, or Rockefeller Forest exits.