MUIR WOODS MOUNTAIN CHALLENGE
10K, Half, 30KJuly 18, 2026
Mt. Tamalpais State Park
Stinson Beach, CA
CONGRATULATIONS MUIR WOODS MT. RUNNERS, HIKERS & FROLICKERS!
RACE INFO
The Muir Woods Mountain Challenge (Formerly Table Rock) is a true competition for event-experienced and novice mountain runners alike. The race starts off with a bang, as you climb 2,000′ in just over 2 miles up the infamous Willow Camp hill. In between the heavy breaths, take in the views of Stinson Beach and the Pacific Ocean along the ridge-line and tight single-track of the Coastal Trail. Make a breathtaking decent using the runner-favorite damp and twisting Matt Davis Trail, where the 10K runners will triumphantly return to the beach. The Half and 30K head back up Mt. Tam, this time along the Dipsea Trail then continuing for a gorgeous romp through Muir Woods. Once you hit the Cardiac Hill summit, you’ll bomb back down to Stinson Beach along the famous Dipsea Trail, with incredible views – and harrowing steps – along the way. Bring the family and enjoy the best Marin has to offer.
Park Information: Mt. Tam State Park, Muir Woods National Monument
Start Times:
30K & Half – 7:30 AM
10K – 7:50 AM
Check-In & Bib Pickup:
Early Check-In
Friday, July 17
2:00 PM – 6:00 PM
San Francisco Running Company
247 Shoreline Highway, Mill Valley, CA 94941
Race Morning
At Stinson Beach North Parking Lot
6:30 AM – 7:50AM
Time Limit: There is a 6.5 hour time limit for the Half Marathon and 30K race. All runners must be off the course by 2:00 PM.
Parking: Parking is available within the Stinson Beach Day Use Area and is free of charge. Carpooling is always strongly encouraged.
Directions:
Stinson Beach Park
Golden Gate National Recreation Area
3545 Shoreline Hwy, Stinson Beach, CA 94970
Click for Directions
Capacity: The Muir Woods (Table Rock) Trail Run has a capacity of 300 runners, across all distances.
Timing: All races are professionally chip timed, utilizing MyLaps and Race Director, ensuring your time is captured as accurately as possible. Disposable chips are attached to back of each bib number.
Post Race: We offer a broad selection of sweet and salty snacks, as well as fresh fruit and a diverse line up of pre-packaged food options (chips, fruit snacks, jerky, etc.)
Dog Policy: Dogs are allowed at Stinson Beach. Pups must be on leash at all times. However, dogs are not permitted on the trails of Mt. Tam, so you may not run with your pup.
MUIR WOODS MT CHALLENGE COURSE MAPS
30K Course Map
19.1 Miles | ~5,100' Elevation GainHalf Marathon Course Map
13.5 Miles | ~3,600' Elevation Gain10K Course Map
6.7 Miles | ~1,890' Elevation GainDETAILED COURSE INFO
Printable Course Information
Course Composition
The vast majority of the course will be run on technical dirt trails and fire-roads. The course has long grinding hills, rocky & rooty descents, steps, and lots of twists & turns. It’s a trail runner’s dream! Hiking/trekking poles are permitted at this venue.
Course Markings
Courses are marked with colored surveyor ribbon, placed approximately every 200 meters along the course. Turns are marked heavily on the inside of the turn, with ~3 ribbons placed just before and just after the intersection. There will also be 8.5″ x 11″ laminated signs and flour arrows on the ground (when allowed) at critical or complicated sections. The detailed course map displays which colored ribbons must be followed for each route. If you are running a longer distance, please keep in mind you will likely need to follow more than one color while out on the course. The most important course markings are the blue ribbons. Blue ribbons indicate “wrong way” trails. You will see blue ribbons, but do not run past a blue ribbon or you will be heading off course!
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 and chews, Gu Stroop-Waffles, trail mix, pretzels, potato chips, Oreo cookies, PB&J sandwiches, M&M’s, boiled potatoes with salt, Coke, Ginger Ale, water, Skratch Hydration Mix, salt tablets, and seasonal fresh fruit. 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.
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)
Drop bag services are not available.
Cupless Event
This a cupless event, meaning aid stations will not have paper cups available for runner use. Each runner will be responsible for carrying their own water bottle or reusable cup. Reusable cups are made of silicone, are collapsible, and easy to carry with you while you run. Going cupless will keep hundreds, or thousands, of paper cups from being thrown away or left littering the trails. Read more about our cupless events here. Reusable runner cups or 500ml soft flasks will be available for purchase at most events. We cannot sell anything on NPS land, be sure to bring a cup or flask with you to the start of the race.
Run with us on Mt. Tam!
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.
AWARDS
★ In an effort to promote healthy competition, overall awards are determined by gun time (the first 3 men and women across the finish line). Age group awards are determined by chip time (the time from crossing the start line to crossing the finish line).
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.
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 male, female, and non-binary:
• 13 and under
• 14 – 19
• 20 – 29
• 30 – 39
• 40 – 49
• 50 – 59
• 60 – 69
• 70 and over
SHIRTS
Most of our race day 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 30
To be guaranteed your shirt size, you must register by July 6, 2026.
COURSE RECORDS
| Distance | Name | Age | Year | Time |
| 10K – Male | Justin Morejohn | 32 | 2014 | 52:09 |
| 10K – Female | Charlotte Skaunsgaard | 40 | 2014 | 1:03:52 |
| Half – Male | Gary Gellin | 48 | 2017 | 1:48:57 |
| Half – Female | Jennie Yeaman | 23 | 2016 | 2:09:11 |
| 30K – Male | Patrick Parsel | 33 | 2019 | 2:20:17 |
| 30K – Female | Amy Leedham | 33 | 2018 | 2:56:19 |
PAST RESULTS
MUIR WOODS MT CHALLENGE
July 13, 2024
TABLE ROCK TRAIL RUN
July 20, 2019
Half Overall
30K Overall
Results for previous years can be viewed on Ultrasignup.
THE FINE PRINT
ITR Refund Policy:
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 unfortunate 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.
Please refer to our online FAQ page for answers to other commonly asked questions.
MUIR WOODS MT CHALLENGE PHOTOS
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