Dogs are allowed in the Knickerbocker Canyon Trail Run, including all distances. There is a 5K, 10K, Half Marathon and 35K race. They all begin at the American River Canyon Overlook Park in Auburn, CA. Runners with dogs need to start in the back.
The Zoomies 50K also offers a 5K, 10K & 15K option. The race goes around a 1.57-mile loop so you complete it 20 times for the 50K. Dogs are welcome and the course will feature rescue animals available for adoption.
The Reservoir Dogs Trail Run offers a 5K, 10K, half marathon and 35K race at the San Pablo Reservoir. Dogs are allowed in all distances and are asked to start at the back of the pack. There is a 6.5 hour time limit for the half marathon and 35K race.
Well-behaved, leashed dogs are allowed to run in all three races, the 100-miler, the 100K and the 20-miler. They must not bother any people, dogs or wildlife. The course is single track on 20-mile loops. Anyone who lets their dog off leash will be disqualified.
Well-behaved, leashed dogs are welcome on both the Deception Pass 50K and 25K courses. There is also a 1K Fun Run. This area is known for its rugged coastlines, cliffs and dense forests. There are no mountains or long climbs in this race.