Mt. Tam Wild Boar Half Marathon & 10k

Saturday, April 26, 2025 Mill Valley, CA

Mt. Tam Wild Boar Half Marathon & 10k in Mill Valley, CA

Prepare for a trail running experience that’s nothing short of breathtaking – the Coastal Ridge Trail Run is back, and it’s promising a day of exhilarating adventure and unparalleled views. If you’ve been waiting for the perfect opportunity to lace up your running shoes and explore the stunning landscapes of Mt. Tam, this is it.

Nestled high up on Mt. Tam, this coastal ridge trail run takes you through rolling singletrack, offering vistas of the Pacific Ocean that will leave you awe-struck. It’s an event that combines the best of both worlds – the tranquility of dirt singletrack trails and the picturesque beauty of paved roadways.

As you start your journey at Rock Springs, you’ll be greeted with panoramic views of Bolinas Lagoon, the Pacific Ocean, and the pristine Marin County watershed. The course follows Ridgecrest Blvd., tracing the spine of Bolinas Ridge, which separates East and West Marin County. It’s a route that’s designed to immerse you in the natural beauty of the area, making every step a delight.

For those tackling the 10K race, your journey will take you on a memorable adventure. After following Ridgecrest Blvd., you’ll turn onto the Willow Camp Trail, guiding you back to Rock Springs along the enchanting Coastal Trail. It’s a route filled with surprises and opportunities to connect with the beauty of nature.

If you’re up for a bigger challenge, the Half Marathon course awaits. It continues along Ridgecrest Blvd., leading you to Bolinas/Fairfax Road. The return journey is equally spectacular, as you make your way back via the Coastal Trail, a path that promises even more breathtaking views.

What sets this year’s event apart is its exclusivity. The Coastal Ridge Trail Run is limited to just 300 participants. With such a small and intimate gathering, you can expect a more personal and memorable experience. It’s a rare opportunity to enjoy the serenity of the trails and the views of the Pacific Ocean in a close-knit community of fellow trail runners.

So, don’t hesitate – register now and secure your spot in this coastal ridge trail run. Whether you’re a seasoned trail runner or someone looking to explore the beauty of Mt. Tam for the first time, this event offers a unique experience that combines the joy of running with the magic of nature. Join us for an unforgettable day on the trails, and be part of this exclusive running community.

Race Weather & Climate

Situated in Marin County, Mill Valley, California, is approximately 14 miles north of San Francisco, offering a peaceful suburban environment with convenient access to the nearby Golden Gate National Recreation Area.

In Mill Valley, CA, April 26th sees average high temperatures of 60-65°F and average low temperatures of 45-50°F in Mill Valley, CA. It’s late spring with mild and pleasant conditions, and minimal rainfall.

Mt. Tam Wild Boar Half Marathon Race Results

Mt. Tam Wild Boar Half Marathon Course Map

See the race route map for the Mt. Tam Wild Boar Half Marathon course map here.

Starting Time

The half marathon start time is 8:00 AM PDT.

The time limit for the half marathon is 3 hours.


To reserve your spot in the 2025 Mt. Tam Wild Boar Half Marathon, you can use the registration link here.

Race Fees

  • There is a $80.00 fee for the half marathon for adults.
  • There is a $70.00 fee for the 10K for adults.
  • There is a $30.00 fee for the half marathon for youth.
  • There is a $25.00 fee for the 10K for youth.

Mt. Tam Wild Boar Half Marathon Race Website

Mt. Tam Wild Boar Half Marathon Website

See more races in: April, California