Quad Dipsea

Let's GO! Get in NOW! registration has landed in its second price tier. On July 17th it jumps up to the final one. This baby will sell out. So, save some mon$ come and run! 2026 Race Day is August 15th! NOTE: We WILL NOT BE the 2026 USATF 50k Trail Championship. The committee wanted to award it to an event that's never held it before and we're stoked to share the love! BUT, We WILL STILL be part of the USATF PA Grand-Prix. And, once again we'll "show you the money!" with our $10,000 podium purse!!! Get in for the 27th edition of this Northern California Classic, because this party's gonna' blow up! The Race Originally founded in 1995 as the Pt. Reyes 50k and reimagined as the current course in 1998, The Tamalpa Headlands 50K presented by Arc'teryx and the Tamalpa Runners features many of Marin County's most iconic and challenging trails: Coastal, Miwok, Matt Davis and Dipsea. The idyllic and beloved Santos Meadow near Muir Woods is the location of the start and finish line after-party. Just

a hop and a skip from San Francisco, the course traverses approximately 6,600 rugged feet of elevation gain featuring a mix of steep climbs, fast descents, flowy singletrack, and on a clear day, stunning views of the Bay Area, Pacific Ocean and beyond. You'll experience all the splendor that the Marin Headlands and Mount Tamalpais has to offer in one of the country's most stunning locations to celebrate the sport of ultrarunning.Full race information, course details, past results, and lodging info are available at https://www.headlands50k.com/ Check out the Strava flyover! Start, Time Limits, & Cutoffs The start is 7:30AM at Santos Meadows. Not 7:29, or 7:31, but 7:30 SHARP! Vital cutoff times and locations are: Tennessee Valley- East 11:30AM (4 hours), Highway1 12:30 (5 hours), Cardiac 1st pass 2PM (6 hours 30 min.), Stinson Beach 3:30PM (8 hours), Cardiac 2nd pass 4:45PM (9 hours 15 min.), Santos Meadows Finish 5:30PM (10 hours). This important timeline can also be found on our website.

USATFPA Grand Prix for 2026 Sadly, we won't be the 2026 USATF Trail 50k Championship, but we will remain a part of the Pacific Association Grand Prix. After multiple years of the TH50k hosting the Championship, the USATF committee wanted to give the opportunity to a race that's never held the event. We're truly stoked for them. There is no doubt in our minds that the championship will come back to us again. Why? Because were freakin' cool. So, by no means should this affect your decision to run with us. As you may or may not know, we are definitely the most outrageously exciting, beautiful, fun and unpredictable race ever! I will always guarantee that. Volunteers! Link will be live soon. If you can't run, but want to still be a huge part of the event, volunteer options are available through the website link: https://www.headlands50k.com/ Aid Stations The most amazing aid stations ever are located at Rodeo Beach mile 8.3, Tennessee Valley- East mile 11.5, Highway1 mile 14.8, Cardiac 1st pass

19.5, Stinson Beach mile 24.1, Cardiac 2nd pass mile 27.7, and Santos Meadows Finish. Rules We love dogs!!! Unfortunately, they're not allowed at Santos Meadows. PLEASE, leave your fur babies home, with a friend, or with your in-laws like we'll be doing.If you drop out of the race, please let a race official or aid station captain know.We are a cup-free race. Runners must carry their own collapsible cup or other drinking device such as water bottles and hydration packs. THERE WILL BE NO DISPOSABLE CUPS AT ANY AID STATION.Runners do NOT have the right of way at road crossings or on the trail. Be careful at road crossings; pay attention to course monitors and park officials. Be courteous and respectful of hikers, bikers and horses on the trail. Be quiet and cautious going past the horse stable area in Tennessee Valley; we have strict permit use restrictions for that area.The official course is on the trails and runners will be disqualified for cutting switchbacks. Refunds and Exchanges 50%

refund if you withdraw by 06/30. No refunds thereafter. No exchanges permitted. Rollovers will be allowed. Event's current local time: 1:15 AM PT

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

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