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black Audi Power of Four 50k

  3.7 ( 3 ) Favorite


32.6 mile 52.5 kilometer point to point
74% Runnable


Ascent: 9,761' 2,975 m
Descent: -9,290' -2,832 m
High: 11,514' 3,509 m
Low: 7,918' 2,414 m


Avg Grade: 11% (6°)
Max Grade: 44% (24°)


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Trail shared by Brendan Collins

One of three separate Power of 4 races - a premier endurance series in the Aspen Snowmass mountains.

Brendan Collins

Features Birding · Fall Colors · River/Creek · Views · Wildflowers · Wildlife

Cut-Off Times: To ensure racer safety, we will have a cut-off at the Tiehack Parking lot. The cut-off time will be at Noon at Tiehack parking lot.

Normal Mountain Operations: We ask each racer to keep in mind that Snowmass and Aspen Mountain will be open to guests as usual starting at 10am. Also, Government Trail is open to the general public on race day, so please be respectful of the general public on the trails and aware of other users.


Aspen Snowmass is proud to present the Audi Power of Four Trail race celebrating the amazing trail running offered in the Roaring Fork Valley and continuing the great tradition of the Audi Power of Four Series. The 50K Ultra as well as the 25K are part of the Skyrunner USA Series. The 50K covers the four Aspen Snowmass mountains utilizing a mix of singletrack and dirt road. The event also offers a 25K race along the famed Government trail covering Buttermilk and Snowmass mountains. A 10K option is also available and will start at the Elk Camp restaurant located mid-mountain on Snowmass and finish in Snowmass Base Village

The Audi Power of Four Race Series is a premier endurance race series utilizing the unique and amazing terrain of each of the four Aspen Snowmass mountains. Each race is designed to test the limits and skills of both elite and recreational athletes.

Need to Know

Please check the website for additional information…

Runner Notes

Racer Bags: Each racer will be allowed to deposit one bag at the start that will be shuttled to the Tiehack aid station or finish line. In an effort to reduce waste, we will not provide a bag; please bring your own. Make sure your name and bib number are clearly written on the outside of the bag.

Course Marking: The course will be marked with red/white striped tape and directional signage with the event logo.

Aid Stations: Each Aid Station will have water, Red Bull, Clif Bars, Clif Shot Gels, Coke, candy and other snacks to keep you fueled. Aid stations will be placed at the following locations:

  • Top of Aspen Mountain (5.23 Miles from start)
  • Intersection of Midnight Mine and Castle Creek Road (10.32 Miles from start)
  • Tiehack Parking Lot (15.55 Miles from start)
  • Elk Camp Restaurant (23.05 Miles from start)

There will be other locations along the course with limited resources available (water).


Aspen Mountain
- Start on the west side of gondola plaza (Residence's at Little Nell side)
- Climb Little Nell
- Turn left at bottom of Bell Chair to Bingo Slot
- Up Spar Gulch to base of Ajax Express Chair
- Follow Deer Park Trail
- Climb Silver Bell to summit at Sundeck
- Descent Midnight Mine Road to Castle Creek Road

Aspen Highlands
- Up Congo Trail from Castle Creek Road
- Right on Grand Traverse at the top of Congo Trail
- Left at Wine Ridge
- Left on Summer Road up on to Broadway to Patrol HQ (out & back section)
- Down Broadway (Summer Road) to Merry Go Round restaurant
- Left on road between Merry Go Round restaurant and guest service pavilion
- Follow road to bottom of Cloud 9 lift
- Turn right down Memory Lane
- Left down Summer Road from wide turn-around
- Left on rig path off Park Ave towards Lower Stein
- Left on Summer Road from top of Lower Stein
- Left from Summer Road down Lower Jerome Park
- Under bridge and right onto Thunderbowl Lane
- Cross Maroon Creek Road onto trail

- From Tiehack Parking Lot follow trail up Eagle Hill
- Continue on trail up Sterner Gulch
- Follow trail up Ptarmigan to top of Tiehack
- Pass Cliff House and continue up Tom's Thumb towards top of W Buttermilk
- At the top of W Buttermilk Lift go past warming hut out the gate to follow trail along the ridge
- Turn right and descent trail through Sugar Bowls
- Turn left on Government Trail and follow to Snowmass ski area gate

- From Government Trail gate onto Snowmass turn left and follow Elk Camp road up a few hundred feet
- Turn right onto Government Trail/Vista Trail and then turn left onto Vista Trail
- Follow Vista Trail to Elk Camp Restaurant turning left behind restaurant and following road to the right around the restaurant
- From Elk Camp Restaurant follow signage to the Espresso trail
- Follow Espresso (there are two locations this trail crosses roads and the trail follows the road uphill until you see signs for the trial)
- Turn left on Cross Mountain Trail after series of switchbacks
- Follow Cross Mountain trail past Ullrhof Restaurant (bear right after large wood bridge)
- Continue on road past restaurant through tunnel and bear left onto Village Bound after you go through the tunnel
- Continue on Village Bound Trail past intersection with Government and turn left at the intersection with Connector Trail
- Follow the Connector Trail down to the Ditch Trail and turn right.
- Cross over Divide Dr onto Sleigh Ride trail
- Follow Sleigh Ride to the work road and turn left onto the Discovery Trail
- Run down Discover trail then merge with the work road
- Follow the road to the finish in Snowmass Base Village


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