Apr19Sat
Hotel Deal

Caldera Burn

Ski mountaineer ascending Mammoth Mountain
Date & TimeApr 19, 20257:00 AM - 1:30 PM
Location

Mammoth Mountain Ski Area
10001 Minaret Rd
Mammoth Lakes, CA 93546

Event SponsorsSun Bum, Athletic Brewing Co., Dakine, GoPro, & The North Face

Skin to Win


Lung–burning fun for all at the Mammoth Caldera Burn – a ski mountaineering challenge. Participants will skin their way through multiple ascents on Mammoth Mountain to complete this battle against themselves and the terrain. Ski mountaineering (ski mo), a high-altitude up and down challenge imported from Europe, is rapidly becoming one of the hottest new winter sports in North America. The short course is perfect for backcountry skiers of any skill level interested in learning new aspect of the sport. The long course is designed to showcase Mammoth's steep, technical skiing.

Event Registration


Early Bird Registration Advance Registration Week-of Registration
January 1–March 21 March 22–April 13 April 14–18
$75 $85 $95

Register for caldera burn


Registration closes at 11:59 pm on April 17, 2025. Day-of registration will not be available.

Additional Information

Long Course

4,800 gain and loss over 7 miles


  • The first ascent is from Canyon Lodge to the top of Ricochet. From the starting line ascend Schoolyard to Round Robin to Avalanche to Solitude to Roma's Road to the top of chair 9. 2,000 feet of gain over 2 miles.
  • The first descent is from the top of Dave's Glades to the bottom of Dragon Alley. From the top of Dave's Glades descend the ridge to Dragon's Back, take a left turn down the chute (Back #3) down the runout to Ricochet and Dragon Alley. 1,826 feet of loss over 1.1 miles.
  • The second ascent is from the bottom of Dragon Alley to the top of Dave's Run. Skin up Dragon Alley to the bottom of the runout of the chutes on Dragon's Back. Transition to booting and climb up Dragon's Back via Back #2. At the top of Dragon's back, boot then skin to the top of Dave's Run. 2,000 of gain over 1.2 miles.
  • The second descent is down Dave's Run to the bottom of Avy 2. Descend Dave's Run to Roma's Road to Solitude, across the bottom of Sunset, past the top of 16 onto Downhill and stop at the bottom of Avy 2. 1,490 feet of loss over 1.1 miles.
  • The third ascent is from the bottom of Avy 2 to the top of chair 22. Briefly skin up the Two/Three Bowl, transition to booting then ascend Avy 2. 660 feet of gain over .2 miles.
  • The third descent is from top of chair 22 to the finish at Canyon Lodge. Descend Grizzly Ridge to the top of chair 8 to Swell to Gopher Trail to Round Robin to School Yard to the finish.


Short Course

2,700 gain and loss over 5 miles


  • The first climb is from Canyon Lodge to the top of Chair 10. From the starting line ascend Round Robin to Avalanche, across Sunset to Solitude. Bend left toward the top of chair 10. 1,682 feet of gain over 1.5 miles.
  • The first descent is from the top of Chair 10 to the bottom of Holiday. The descent begins down The Canyon Connector then picks up Haven't the Foggiest. Bend right with Haven't the Foggiest, take a hard right onto Holiday, follow Holiday to where Holiday ends at the bottom of Gold Hill. 1,157 feet of descent over .9 miles.
  • The second ascent is from the bottom of Gold Hill to the top of Chair 22. Ascend Goldhill to Quicksilver to Relief to the top of chair 22. 1,217 feet of gain over 1.1 miles.
  • The second descent is from top of chair 22 to the finish at Canyon Lodge. Descend Grizzly Ridge to the top of chair 8, to Swell to Gopher Trail to Round Robin to School Yard to the finish.
Caldera Burn FAQ

What equipment is required?

Long and Short Course Participants

  • Alpine Touring or Telemark skis or a splitboard capable of skiing/riding technical alpine terrain in firm conditions.
  • A pair of climbing skins
  • A helmet certified for rock climbing or skiing
  • An avalanche rescue shovel
  • An avalanche probe
  • An avalanche transceiver
  • In the event of inclement weather: buff or balaclava and a wind jacket
Additional Items for Long Course participants ONLY
  • A backpack capable of carrying skis
  • Food and water sufficient to sustain you over 5,200 feet of elevation gain and loss


Is splitboarding allowed?

Yes, however participants are required to adhere to the designated mode of travel; for example booting where skinning is designated would not be allowed. Splitboarders are welcome to ski down with their board split in ski-mode if equipped with heel locking.


Are snowshoes or Nordic skis permitted?

No


Are crampons allowed?

Steps will be kicked for the boot pack sections, and crampons will not be necessary. However, competitors are welcome to use crampons at their own discretion.


Does the course have aid stations?

No. Please be prepared with the appropriate water and snacks.


Equipment Rental


Mammoth Mountaineering Supply is offering discounted rates for Ski Mountaineering racers. Check back soon for more details.


Volunteers Needed

We wouldn't be able to pull off this event without the help of on-course volunteers. If you are interested in volunteering, please contact the Mammoth Mountain Race Department at RaceAdmin@MammothResorts.com.

Caldera Burn Lodging


Save 15% on your stay at select Mammoth Lodging Collection properties during this ski mountaineering challenge.


Caldera Burn Lodging

Events and programs subject to change.


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