This Event Took Place Sat. Mar 15, 2014

Race Description

The Marin Ultra Challenge, our premier Marin County long distance trail race, delivers ample hills and sweeping descents. March 12th marks the 5th 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 a trail runner’s destination.

Since this is one of our favorite and most challenging events, we are offering a good little chunk of prize money in the 50 mile race. Male/Female 1st-$400, 2nd-$225, 3rd-$125. In addition, we will have special awards for the 50K distance and each age group. Don’t miss this grand tour of the ultra-running mecca, Marin County, California.

The Marin Ultra Challenge 25K is the first race of the 2016 La Sportiva Mountain Cup. This year’s Mountain Cup is bigger and better than ever, which means the MUC 25K will be amongst the most competitive trail races in Northern California. The 25K will have a total prize purse of $3,000, with $1000 going to the male and female winners, $250 to second overall, and $150 to third overall. We’ll also be raffling off a ton of goodies at the race, including gifts from La Sportiva, Farm to Feet, and Petzl.

Race Information

Location: Marin Headlands, GGNRA & Mt. Tamalpais State Park

Date: Saturday, March 12, 2016

Events:25K, 50K & 50 Mile

Bib & Shirt Pickup: 5:00 AM - 8:15 AM

Start Times:50 Mile6:00 AM
50K6:00 AM
25K8:30 AM

Time Limit: There is a 14 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

50 Mile - Turn by Turn Directions

Elevation Charts


Course Map

Turn by Turn Directions

Elevation Charts


All registered runners will receive a Greenlayer Sports Evolution technical fabric shirt. Your favorite training tee has been updated for the new season. Made from super soft moisture-wicking fabric, the Evolution Short Sleeve Tee offers the perfect blend of performance, fit and design at an exceptional price point. The Greenlayer logo is featured in a color popping contrast color on the left sleeve.

Fabric: 150g / 50% recycled polyester / 50% polyester

To be guaranteed your shirt size, you must register by February 27, 2016.


Overall winners of each race distance will receive a medal, a custom glass Stein and an item from the ITR schwag bag.

All ultra-marathon distance finishers will receive a custom printed Pint 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:
  • 19 and under
  • 20 – 29
  • 30 – 39
  • 40 – 49
  • 50 – 59
  • 60 - 69
  • 70 and Over

Aid Stations

At Inside Trail Racing aid stations it’s like an all you can eat buffet, but this is a race, so don’t linger too long! Expect to find variety at all of our aid stations, including a plethora of Clif Bar Products (Clif Shot Gels, Clif Bloks, Clif Bars), as well as sweet and salty offerings like trail mix, pretzels, potato chips, Oreo cookies, Pop Tarts, boiled potatoes with salt, PB&J finger sandwiches, regular soda (Coke or Pepsi), Mountain Dew, water, Tailwind Endurance Fuel, PB&J finger sandwiches, M&M's, Mike & Ike's, salt tablets... you get the idea. There will also be general first aid items but no anti-inflamatory medicine. We strongly encourage all runners to carry at least one 20oz bottle from which to sip while you enjoy your run.

Local time: 11:11 AM


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Tim Stahler
Race Director

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