Race Information 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, CA50K PRIZE PURSE Female and Male Top 3 overall.1st - $300, 2nd $200, 3rd $100.Date:Saturday, November 7, 2026Events:10K, Half Marathon, 30K, 50KFriday Bib Pick-up: SF Running Company Mill Valley 2:00 PM - 6:00 PMSaturday Bib Pick-up and Check-in @ Stinson Beach: 6:30 AM – 8:00 AMStart Times:10K - 8:00 AMHalf Marathon - 8:00 AM30K - 7:30 AM50K - 7:30 AMTime Limit: There is an 8.5 hour time limit for the 50K raceParking: 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 500 runners, across all distances. Course Information Detailed Course Map | Turn by Turn Directions | Aid Station Distances and Cutoffs | Elevation Profiles Aid Stations 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 (Note: GGNRA does not allow Gu Gels at aid stations on their property: Muir Beach), chews, and Stroopwafels, trail mix, pretzels, potato chips, Oreo cookies, boiled potatoes with salt, Coke, Ginger Ale, water, Skratch Hydration Mix, Pickle Juice, PB&J sandwiches, M&M’s, salt tablets, bananas, watermelon, and tangerines. Aid stations are also equipped with general first aid items, including Salt-Stick tablets, but no anti-inflammatory medicine.Skratch Hydration is mixed so that it contains 80 – 100 calories per 20
fluid ounces.As distances between aid station vary, we strongly encourage all runners to carry at least one 20oz bottle during their run. Volunteer 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.To volunteer for this year’s event, please submit our online volunteer form. Shirts Most of our race shirts are District Perfect-Tri tri-blend fabric shirt. This tee is made with top-of-the-line sportswear technology to heighten performance during your toughest workouts. With sun defense, moisture-wicking technology, quick stain release, and
comfortable fit, this tri-blend performance crew serves the needs of every athlete. It’s the perfect year-round choice for outdoor sports and exercise. Get the most out of your workout with this tough, hardworking tee.Features: ● 4.5-ounce, 50/25/25 poly/combed ring spun cotton/rayon, 32 singles ● 1X1 rib knit neck ● Shoulder to shoulder taping ● UPF 30To be guaranteed a shirt and shirt size, you must register by October 24, 2026. Awards The top three overall winners (male and female) of each race distance will receive a custom trophy with the race logo. 50K PRIZE PURSE Female and Male Top 3 overall.1st - $300, 2nd $200, 3rd $100.In addition, the top finisher for each distance (male and female) will receive a special item from one of Inside Trail’s sponsors.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 males, females and non-binary: ● 13 and under ● 14 – 19 ● 20 – 29 ● 30 – 39 ● 40 – 49 ● 50 – 59 ● 60 – 69 ● 70 and overAge-group winner awards from Atlas Wine Co. will be awarded to 21+, for both males and females. The Fine Print Entry fees to our trail runs are non-refundable in all cases, and we do not offer credits, transfers, or deferrals to future races except as described below. Only registered runners can participate in our races, and you cannot exchange your entry with anyone else in any case. We are happy to issue a credit worth 50% of your original race fee toward a future Inside Trail Racing event if we receive your cancellation at least 3 weeks prior to the race. Credits will expire 1 year after the date issued. There will be no credit provided if a cancellation is made within 3 weeks of the race. While we understand that last-minute injuries, conflicts, emergencies, deaths, and other unfo
rtunate events affecting registered runners can happen and may impact your plans for participation, we must adhere to our cancellation policy stated above and cannot offer any credits, refunds, transfers, or deferrals in any of these cases. If the situation does arise where ITR must outright cancel an event for any reason, there will be no refunds. This could include earthquakes, floods, extreme weather, unsafe air quality, pandemics, or any other “Act of God”. ITR at its sole discretion may choose to offer future race credit or deferrals in these force majeure situations, depending on the circumstances and how close to the race date the event was cancelled. We will communicate with all registered runners as soon as possible regarding the cancellation and any pertinent information. We do not cancel races due to rain or heat. Due to trail work, closures, or for myriad other reasons, permitting agencies may require changes to the publicized courses at any time prior to an event. This is out
of our control, and we therefore will not offer refunds, credits, deferrals, or transfers (except as described below) in such a situation. If a race location is changed, but still hosted on the same day, we will automatically transfer the registration over to the new venue, or entrants may choose to run the race remotely and we will mail awards. If a race is postponed all entrants will be transferred to the new date. www.insidetrail.com Event's current local time: 1:59 AM PT