Saturday, Mar 11, 2017

Marin Ultra Challenge

Fort Baker

Sausalito, CA 50 Miler, 50K, 25K

This Event Took Place Sat. Mar 11, 2017

Race Description

The Marin Ultra Challenge, our premier Marin County long distance trail race, delivers ample hills and sweeping descents. March 10th marks the 7th edition of this tour of some of Marin’s best trails. Meticulous effort went into the design of each course for the MUC; all three distances are physically demanding (the 50 Mile has just about 11,000 feet of elevation gain) and exceptionally beautiful. The journey begins underneath the Golden Gate Bridge, then traverses the Marin Headlands, Stinson-facing Mt. Tamalpais and Muir Woods, exhibiting a range of terrain, from exposed fire-roads with incredible coastal and inland views to tight, technical single-track with redwood canopies. There is very little trail overlap, and Jim Vernon, from The Endurables and Hydrapak, spent hours and weekends developing these spectacular custom courses–we are super excited to show it off. You’ll quickly realize why Marin County has become the ultimate trail runner’s destination.

Race Information

Location: Marin Headlands, Muir Woods & Mt. Tamalpais State Park

Date: Saturday, March 11, 2017

Events:25K, 50K & 50 Mile

Bib & Shirt Pickup: 5:00 AM - 8:00 AM

Start Times:50 Mile6:00 AM
50K6:00 AM
25K8:00 AM

Time Limit: There is a 14.5 hour time limit for the 50K and 50 Mile race.

Course Information

50 Mile & 50K

Course Map

Miles 1 - 15 & Miles 39 - 50 / GGNRA

Miles 15 - 39 / Mt. Tamalpais State Park

Elevation Charts


Course Map

Elevation Charts


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.


Overall winners of each race distance will receive a custom MUC award from Elevation Culture.

The top 3, male and female, finishers in the 50 Mile event will receive a custom trophy, a pair of La Sportiva Mountain Running shoes as well as the following cash awards:
     ● 1st - $500
     ● 2nd - $250
     ● 3rd - $150

The top 3, male and female, finishers in the 50K event will receive a custom trophy, and a pair of La Sportiva Mountain Running shoes.

The top 3, male and female, finishers in the 25K event will receive a custom trophy, and pair of La Sportiva Mountain Running shoes.

All ultra-marathon distance finishers will receive a medal and a custom printed drinking glass with the race logo.

All other 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 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 an A4 Cooling Performance Crew technical 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, the cooling 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.

Fabric: 4-Ounce polyester interlock features moisture wicking technology, odor resistance and stain release qualities designed to deliver maximum performance characteristics.

     ● 100% Polyester Interlock, 4.0 ounces per square yard
     ● Moisture wicking, Odor resistant, Stain release
     ● Ultra tight knit resists snagging
     ● UPF 30

To be guaranteed your shirt size, you must register by February 25, 2018.

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, 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.

Tailwind is mixed so that it contains 180 – 200 calories per 20 fluid ounces.

Local time: 4:15 AM


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