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  • Distance: 395 m from Stinson Beach
    Sat, Nov 07, 2026

    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

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    10k30k50kHalf MarathonRunTrailUltra via UltraSignup
  • Distance: 13.8 km from Stinson Beach
    Sat, Feb 06, 2027 at 7:50 AM

    Enjoy vistas of the Pacific Coast and of the spectacular Marin Headlands with views of Tiburon, San Francisco and the Golden Gate Bridge.

    2 Miles8k13.1 Miles30k26.2 Miles50kRunTrail via RunSignup
  • Distance: 13.9 km from Stinson Beach
    Fri, Sep 11, 2026 at 12:01 AM

    The Badger's race RETURNS to China Camp State Park in Santa Venetia, CA! If the LIVE option doesn't work for you, we're supporting VIRTUAL as well. We'll be happy to ship your swag and you can participate wherever you are!

    Where: China Camp State Park in Santa Venetia, CA.

    When: Sun, 9/13- 9:15AM-1:00PM

    Course Maps: 5K Course Map, 10K Course Map, Half Marathon Course Map.

    *NOTE-The half marathon is a STOUT challenge. We would NOT recommend the half marathon if you've never covered this distance before and/or you are not doing any kind of trail running currently.

    The Swag:

    All participants receive...

    • An epic, trail run at China Camp State Park (assuming you're not participating virtually)

    • An AWESOME race woodallion AND lifestyle tee

    • A custom Honey Badger beer sampler stein.

    • An awesome post race goodie bag & post race snacks/beverages including Jambar, Bellwether Farms Yogurt, and more!

    • Access to the post race BREWFEST sponsored by Standard Deviant Brewing.

    Pre-Race Bib & Shirt Pickup:

    -Sat, 9/12 from 12-4PM at A Runner's Mind SF (3575 Sacramento St).

    A friend/family member can pickup your bib/shirt for you if they furnish proof of your registration. We will also support race morning bib pickup between 7:30-9AM at the race start/finish area.

    PLEASE NOTE WE CANNOT SUPPORT REFUNDS, TRANSFERS, AND/OR CREDITS.

    In the event of race cancellation due to wildfires, hazardous air quality, hazardous weather conditions, natural disasters, COVID and/or other global pandemics, or any 'act of God' (force majeure) that is beyond our control, we cannot support refunds, transfers, and/or credits. Please note this has only happened ONCE due to COVID in 2020, but anything is possible. Please make sure you are comfortable with these potential risks before you sign up.

    In the event of race cancellation due to any of the aforementioned, we will ship all race swag/items to participants and provide direction around navigating the course(s) on your own. We'll also provide direction around submitting your result.

    We also cannot support refunds, transfers, and/or race credits if you get injured in the days/week(s) leading up to race day, if your schedule changes in the days/week(s) leading up to race day, if a work trip comes up that makes it impossible for you to attend on race day, and/or any other professional or personal matter that arises making it difficult for you to attend in person on race day.

    In the event of any of the aforementioned, we will ship all race swag/items to said participants and provide direction around navigating the course(s) on your own. We'll also provide direction around submitting your result.

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    5k10k13.1 MilesRunTrailVirtual via RunSignup
  • Distance: 15.6 km from Stinson Beach
    Sun, Feb 28, 2027 at 9:50 AM

    Angel Island is a hilly, grass- and forest-covered island that provides spectacular views of Marin County, San Francisco, and the Golden Gate. Trails and roads circle the entire island and climb Mount Livermore. Bring the whole family and enjoy a post-run picnic at beautiful Ayala Cove.

    (Distances are accurately measured using a Rolatape® surveyor's measuring wheel.)

    2 Miles5 Miles10 Miles15 MilesRunTrail via RunSignup
  • Distance: 17.3 km from Stinson Beach
    Sat, Dec 05, 2026

    Race Information Once a thriving Chinese settlement subsisting off of shrimp fishing, China Camp is now a popular state park for boaters, runners/hikers, and mountain bikers. An extensive trail network will greet you with views of Mt. Tam, San Pablo Bay, and San Francisco Bay as you traverse twisting single-track trails, climbing up and over the peak. The courses wind along thick forests and descend out into open trails on the San Pablo Bay side of the park. Each race is relatively fast, with a nice punch of a climb beginning 1.5 miles into the course, leaving plenty of room to push it or just hike and enjoy the wild turkeys and sounds of the woods around you. China camp is a rare locale for a running race, so be sure not to miss this special event.Location: China Camp State Park and Henry Barbier ParkDate: Saturday, December 5, 2026Events: 10K, Half Marathon, 30KCheck-In & Bib Pickup: 7:30 AM – 9:00 AMStart Times: ● 30K & Half Marathon – 8:30 AM ● 10K – 9:00 AM Time Limit: There

    is a 6 hour time limit for the 30K race.Parking: There is no charge for parking. Please park along N. San Pedro Rd. at the entrance to Miwok Meadows (you may use address: 800 N. San Pedro Road, San Rafael, CA). Then walk up the dirt access road to the start/finish area. Carpooling is always strongly encouraged.Race Capacity: The Peacock Gap Trail Run will have a capacity of 275 runners, across all distances. Course Information Detailed Course Map | 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, chews, and Stroopwafels, trail mix, pretzels, potato chips, Oreo cookies, Coke, Ginger Ale, water, Skratch Labs Sports Hydration Mix, 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 Labs is 80 calories per serving with minimal sugar (4g per 100 ml) and a ratio of sugar (glucose + fructose) that is optimized for faster absorption, an electrolyte profile that actually matches what is lost in sweat (800 mg sodium, 80 mg potassium, 100 mg calcium, and 80 mg of magnesium per liter)As distances between aid station vary, we strongly encourage all runners to carry at least one 20oz bottle during their run.We are CUPLESS. This means no cups at aid stations or at the finish area. Bring a reusable cup or water bottle to fill. 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 November 21, 2026. Awards The top three overall winners (male and

    female) of each race distance will receive a custom trophy with the race logo. 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.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 over The Fine Print Entry fees to our trail runs are non-refundable, and we do not offer transfers or deferrals to future races. However, with advanced notice, we are happy to credit part of your entry fee to a future Inside Trail Racing event. A credit worth 50% of your original race fee will be issued if the cancellation is received at least 3 weeks prior to the race. There will be no credits or refunds provided if a cancella

    tion is made within 3 weeks of the race. Only registered runners can participate, and you cannot exchange your entry with another runner. Credits will be available for 1 full year from its issue date.Only registered runners can participate, and you may not exchange your entry with another individual.We do not cancel races due to rain or heat. Due to trail work, closures, "Acts of God", 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 or credits in such a situation. If a race location is changed due to park closures, we will automatically transfer the registration over to the new venue, or entrants may choose to cancel their entry (non-refundable and non-transferable) and we will mail awards.Hosting a trail running event is an expensive and risky endeavor. All race costs are paid for well in advance of race day, so there is no financial gain to be

    made if a person does not show up on race day. We want all of our registered runners to show up, run, and have fun. While we understand that injuries, conflicts, emergencies, deaths, and other unfortunate events happen and may impact your plans for participation, we must adhere to our cancellation policies.www.insidetrail.com Event's current local time: 1:55 AM PT

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    10k30kHalf MarathonRunTrail via UltraSignup
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