
Weott, United States of America · Sunday 11 October 2026
We ll forgive you if you have trouble concentrating on the road ahead of you while running The Humboldt Redwoods Marathon, half or 5K. After all, you ll probably be looking up at the old-growth redwood trees which tower over the course! This race is in Humboldt Redwoods State Park and the Half Marathon follows the second half of the iconic Avenue of the Giants Marathon course. All courses are USATF Certified. The Marathon is a Boston qualifier. The race starts and finishes at the Dyerville Bridge .
Adjusted Time
1:40:47
Time difference: -4.2 minutes compared to a flat, road, temperate course.
Humboldt Redwoods Marathon, Half Marathon, 5K is a half marathon held in Weott, United States of America, scheduled for Sunday 11 October 2026. The course is run on road surface with 0m of total elevation gain, reaching a maximum altitude of 0m above sea level. For registration and full race details, visit the official Humboldt Redwoods Marathon, Half Marathon, 5K website.
This is a very flat course with only 0m of total elevation gain across the full distance. The course ranges from 0m to 0m above sea level — a 0m elevation range that makes it one of the flatter races available. Runners targeting a personal best will appreciate the minimal climbing.
Humboldt Redwoods Marathon, Half Marathon, 5K is run on road surfaces, which provide the fastest and most predictable conditions for marathon running. Road courses allow for consistent pacing and are typically the best choice for runners targeting a personal best time.
Our difficulty rating for Humboldt Redwoods Marathon, Half Marathon, 5K is calculated using a model that combines elevation gain, temperature impact, and surface type. Use the difficulty calculator above to enter your target finish time and see exactly how many minutes this course would add or subtract compared to a perfectly flat, cool, road-based half marathon. Faster runners and slower runners are affected differently by the same course conditions, so the difficulty is personalised to your pace.
Looking for an easier marathon or a tougher challenge? You can also compare Humboldt Redwoods Marathon, Half Marathon, 5K against other half marathons to find the right race for your goals.
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