Mt. Tamalpais is the dominating feature in Marin County. Any true trail runner who sees it wants to run up it. Here’s your chance. Our Mt. Tam Trail Run begins at Stinson Beach and climbs (and climbs!) to perched views from Tam before returning via some of the best trails the Headlands have to offer until reaching the beach and bountiful post race food. Bring the family and enjoy an afternoon with friends in the sand and surf.
Location: Stinson Beach, CA
Date: Saturday, November 10, 2018
Events: 10K, Half Marathon, 30K, 50K
Bib Pickup and Check-in: 7:00 AM – 8:30 AM
10K - 8:30 AM
Half Marathon - 8:30 AM
30K - 8:00 AM
50K - 8:00 AM
Time Limit: There is an 8.5 hour time limit for the 50K race
Parking: Parking is available within the Stinson Beach Day Use Area and is free of charge. Carpooling is always strongly encouraged.
Race Capacity: The Mt. Tam Trail Run will have a capacity of 600 runners, across all distances.
ITR Refund Policy:
Entry fees to our trail runs are non-refundable. With advanced notice, we are happy to transfer part of your entry fee (75% up to two weeks of the event, 50% from 2 weeks up to 72 hours of the event) to a future ITR event. Only registered runners can participate, and you cannot exchange your entry with another runner.
If a race is completely cancelled or rescheduled, we will transfer 100% of your entry fee to another ITR event. If a race location is changed due to park closures, we will automatically transfer the registration over to the new venue, or we will issue a 100% credit if cancellation is received by 7am on the Friday prior to the event.
Detailed Course Map | Turn by Turn Directions | Aid Station Distances and Cutoffs | Elevation Profiles
Without the support of enthusiastic and caring volunteers producing our races would not be possible. Volunteers of all ages and abilities help with setup, check-in, aid stations, course marshaling, timing, and post-race food.
Volunteering is a fun, novel way to experience races, play in the outdoors, and spend time with friendly people. All volunteers receive a free race T-shirt, free food, and the ability to earn credit toward a future Inside Trail Racing event, commensurate to the amount of time worked. Five hours of assisting an event results in a free race credit or Inside Trail merchandise.
To volunteer for this year’s event, please submit our online volunteer form.
The top three overall winners (male and female) of each race distance will receive a custom trophy with the race logo.
All finishers will receive a custom medal with the race logo.
All 50K finishers will receive a pint glass with the race logo.
The Dead Last Finisher (DLF) in each even will receive a custom award.Age-group medals (3 deep) will be awarded in the following categories, for both males and females:
- 12 and under
- 13 - 19
- 20 – 29
- 30 – 39
- 40 – 49
- 50 – 59
- 60 - 69
- 70 and over
All registered runners will receive Port and Company performance blend t-shirt.. This tee is made with top-of-the-line sportswear technology to heighten performance during your toughest workouts. A soft cotton hand feel joins Dry Zone® moisture-wicking technology for unbeatable comfort and performance. Get the most out of your workout with this tough, hardworking tee.
● 4.5-ounce, 65/35 poly/cotton
● Removable tag for comfort and relabeling
● Side seamed with a contoured body for a slender fit.
To be guaranteed your shirt size, you must register by October 27, 2018.
Inside Trail Racing aid stations are replete with an optimal variety of glycogen-replenishing, electrolyte-replacing products. The following is a list of some of the foods and beverages each aid station may provide: Gu Energy gels and chews, all-natural nutrition bars from Larabar, trail mix, pretzels, potato chips, Oreo cookies, Pop Tarts, boiled potatoes with salt, Coke, Mountain Dew, Ginger Ale, water, Tailwind Endurance Fuel, PB&J sandwiches, M&M’s, Mike & Ike’s, salt tablets, and tangerines. Aid stations are also equipped with general first aid items but no anti-inflammatory medicine. As distances between aid station vary, we strongly encourage all runners to carry at least one 20oz bottle during their run.
Local time: 7:30 PM
Tailwind is mixed so that it contains 180 – 200 calories per 20 fluid ounces.