Running
Marathon
42.2 km
Start: Aug 10, 07:00 AM
Humboldt Bay Marathon
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Road runs in United States, Eureka
Distances
Running
Half Marathon
21.1 km
Start: 08:00 AM
Running
5K
5 km
Start: 08:20 AM
About
A scenic coastal marathon and half marathon held in Eureka, California, featuring the waterfront trail, Arcata Community Forest, and Klopp Lake loop with chip-timed gun starts and ample aid stations.
Catering & aid stations
On-course aid stations provide food and drink approximately every 2 miles along the routes; selections include water, sports drinks, gels, and light solids served by volunteers.
Pacers
Pacers will be present for the marathon and half marathon with target times per start wave; look for pacer flags on race day. Registration includes access to the designated start corrals for pacers as noted in the race schedule.
Results
View official resultsSurface mix
- 100% asphalt
Typical weather in Eureka
Monthly averages based on historical data (2000–present).
Jan54°43°
↑ 07:40
↓ 17:13
Feb54°43°
↑ 07:12
↓ 17:51
Mar54°43°
↑ 07:28
↓ 19:24
Apr56°45°
↑ 06:38
↓ 19:57
May59°48°
↑ 06:00
↓ 20:28
Jun62°51°
↑ 05:45
↓ 20:51
Jul65°53°
↑ 05:59
↓ 20:47
Aug66°54°
↑ 06:28
↓ 20:16
Sep66°53°
↑ 06:59
↓ 19:27
Oct62°50°
↑ 07:29
↓ 18:37
Nov57°46°
↑ 07:05
↓ 16:59
Dec54°43°
↑ 07:35
↓ 16:51
What's included in entry
- Race services
- Race services
- Race services
- Registration includes
- Race services
FAQ
What is the registration deadline?
Registration remains open until race day or until capacity is reached; late registration may be available on-site if slots remain.
Are pacers allowed for all distances?
Pacers are provided for the marathon and half marathon; the 5K is open-paced with no dedicated pacer support.
What is the time limit for each distance?
Marathon: 7 hours; Half Marathon: 6 hours; 5K: No formal time limit, but course closure occurs at 1 PM.
Is gear check available?
Yes, gear check is available at the start/finish area for all runners; bags are returned upon finish.
Are there aid stations on course?
Yes, aid stations are located approximately every 2 miles on the marathon and half marathon courses; the 5K shares the start/finish aid.
Last updated: Jun 5, 2026, 11:53:35 PM
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