Humboldt Bay Marathon 2025

• Scenic course with views of Humboldt Bay, agricultural lands, and the Samoa Bridge, finishing on Eureka's boardwalk.
• Cool, dry August climate ideal for running; average highs around 62.6°F (17°C).
• USATF certified, high rate of Boston Qualifiers; intimate race experience with a small runner field.
• Starts at 7 AM from Madaket Plaza; 8-hour time limit with aid stations every 2 miles.
• Free parking available; bag check at start/finish; finisher medals for all within time limit.

Nestled in the scenic beauty of Northern California, the Humboldt Bay Marathon offers runners an invigorating loop course through the coastal city of Eureka. With a road/pavement surface that presents rolling hills, this marathon is perfect for those seeking a mix of challenge and natural splendor. The unique and breathtaking vistas of the coastline and natural landscapes provide an inspiring backdrop as you navigate the course. Designed with the community in mind, the marathon is part of a larger weekend of events featuring a half-marathon and races for various age groups, including local high schoolers. While details about the exact elevation and distinct course features are sparse, the allure of the Humboldt County’s landscape ensures a memorable experience. It's a race that encapsulates the charm and community spirit of Eureka, making it perfect for both experienced marathoners and local running enthusiasts looking for a rewarding race day. For those interested in exploring the natural wonders of California while pushing their boundaries, the Humboldt Bay Marathon holds an esteemed place on the racing calendar.

Expect temperatures between 52-66°F (11-19°C) with high humidity during the Humboldt Bay Marathon in early August. While the weather is typically cool and dry with light winds, be prepared for occasional unexpected rainfall.

The Humboldt Bay Marathon invites runners to experience a USATF-certified course along the picturesque Eureka Waterfront Trail in Eureka, California. This loop-style route is celebrated for its "near pancake flat" terrain, punctuated by gentle rolling hills as participants cross three low bridges over Humboldt Bay. With a maximum elevation of 168 feet, the course offers a mix of road and trail surfaces, ensuring a smooth run.

Starting and finishing at Madaket Plaza, the marathon showcases the natural beauty of the area. Runners traverse the agricultural lands of Arcata Bottoms, cross the scenic Samoa Bridge, and enjoy the breathtaking views of Humboldt Bay. The race concludes on the Eureka Boardwalk, creating a memorable finish.

Runners appreciate the course for its Boston Marathon qualifying potential, thanks to its flat profile and cool summer climate. The small field size fosters an intimate atmosphere, while the typical foggy, overcast conditions add an intriguing challenge. Although the bridge crossings introduce slight inclines and wind resistance, they contribute to the course's unique character. The Humboldt Bay Marathon is ideal for those seeking a scenic, community-focused race with a touch of coastal charm.

Eureka, California, welcomes you with a delightful mix of scenic beauty and cultural richness, making it a perfect backdrop for the Humboldt Bay Marathon. Beyond the race, immerse yourself in the charm of Historic Old Town, where you can wander through antique shops and savor eclectic dining options. Don’t miss the iconic Carson Mansion, a stunning example of Victorian architecture that has inspired architects and filmmakers alike.

For a taste of local history, the Clarke Historical Museum offers fascinating exhibits, including collections of Northwest Native American artifacts. Enjoy a leisurely stroll along the Eureka Boardwalk & Marina, where you can soak in waterfront views and perhaps catch a summer concert.

Eureka’s artistic spirit is evident in its vibrant arts scene, with local talent adding a unique flair to the community. Experience the Redwood Coast's natural wonders by exploring the majestic redwoods or embarking on water adventures like kayaking and fishing in Humboldt Bay. For dining, try the creative offerings at Los Bagels or indulge in fine cuisine at Restaurant 301 in the historic Carter House. Nearby, the picturesque Victorian village of Ferndale and the coastal beauty of Trinidad Lighthouse await your discovery.