Old Railroad Grade and Hoo-Koo-E-Koo Loop

This mountain bike loop is approximately 24 kilometers (15 miles) long and typically takes around 2 hours and 39 minutes to complete. However, your actual time may vary depending on your fitness level and how often you stop to enjoy the views.

While the Old Railroad Grade offers a relatively gentle and constant climb compared to other routes up Mount Tamalpais, the overall loop is considered a moderate mountain bike ride requiring good fitness. It's described as "not for beginners" but conquerable by riders with "pretty minimal experience." Some sections can be rocky, and the descent can be steep and fast.

A common starting point for this loop is the West Blithedale Avenue Trailhead. Parking availability can vary, so it's often recommended to arrive early, especially on weekends, to secure a spot.

The terrain is diverse. The Old Railroad Grade primarily follows an old railroad bed, consisting of wide fire road with crushed rock and dirt, generally unsuitable for road bikes. It features a steady climb with a grade often between 4% and 7%. The Hoo-Koo-E-Koo Fire Road Trail portion includes natural, unpaved, and gravel sections, along with some asphalt and paved areas. Expect some rocky sections throughout the route.

You'll be treated to stunning panoramic views. The Hoo-Koo-E-Koo Fire Road alternates between shaded creek drainages and exposed ridges, offering vistas of the San Francisco Bay and Marin Peninsula. As you ascend the Old Railroad Grade, especially past the halfway point, spectacular views of San Francisco, the bay, and the ocean unfold. The West Point Inn provides world-class views including parts of the East Bay, San Francisco, the Golden Gate Bridge, and the Pacific Ocean.

Yes, several points of interest enrich the ride. You'll pass the Old Railroad Grade Trail Gate Overlook, the historic West Point Inn (built in 1904), and the View from Eldridge Grade. The Old Railroad Grade itself follows the route of the historic "Crookedest Railroad in the World."

The Mount Tamalpais area generally offers good riding conditions for much of the year. However, for the best experience, consider visiting during the spring or fall when temperatures are mild and the views are often clearest. Summer can be warm and dry, while winter may bring rain, making some sections muddy or slippery.

Yes, the Hoo-Koo-E-Koo Fire Road serves as a key connector. The route also passes through sections of the Old Railroad Grade Fire Road, Eldridge Grade Fire Road, and Indian Fire Trail, allowing for various loop configurations and access to other trails within the Mount Tamalpais State Park network.

Regulations regarding dogs can vary within Mount Tamalpais State Park. Generally, dogs are permitted on fire roads and paved roads but must be on a leash no longer than six feet. They are typically not allowed on single-track trails. Always check current park regulations before bringing your dog.

Mount Tamalpais State Park generally does not require specific permits for mountain biking on designated trails. However, there may be parking fees at certain lots within the park. It's always a good idea to check the official California State Parks website for the most current information on fees and regulations before your visit.

The historic West Point Inn, located along the route, is a notable stop that offers refreshments and a place to rest. For more extensive amenities like cafes, pubs, and accommodation, you'll find options in nearby towns such as Mill Valley.