Treeline Trial Challenge Course

One of the main features of the Lost Forest, Treeline Trial Challenge Course combines rappels, ziplines, bridges and ladders for a thrilling obstacle course in the trees. Learn to trust your instincts, conquer your fears, and surprise yourself.

Treeline Challenge Course at Snowmass

Summer Operating Dates

Open: Daily June 21–September 4, Weekends September: 8-10, 15-17, 22-24, 29-October 1

Close: October 2

Open to families and thrill-seekers, the course has already redefined the on-mountain experience at Snowmass. Choose from five different courses of varying difficulty: Lily Pads (easiest), Snakes & Ladders, Eagle Walk, Spider Web and Islands in the Sky (most difficult).

Planning Information

Allow a minimum of 2 hours to experience the Challenge Course including orientation. Participation in the Challenge Course requires completion of an orientation session which run every 30 minutes at :00 and :30 past the hour, starting at 10:30am and ending at 2:00pm. Guests must select the date and time for their orientation at the time of purchase. There is a maximum of 8 participants per orientation session. Guests should plan to arrive at Snowmass Base Village to check-in outside the Gondola Ticket Office and board the gondola at least 30 minutes prior to their orientation start time. The last opportunity to begin a course is 4:00pm.

Returning guests also need to select the date and time to begin their session at time of purchase, but only need to go through orientation once per summer.

Please review our Lost Forest Rules & Regulations before purchasing admission.

Rules & Requirements

Treeline Trial Course Rules

Allow a minimum of 2 hours to experience the Challenge Course including orientation. Guests must be 12+ years old or accompanied by an adult.

Health Requirements

Guests who are under the influence of drugs or alcohol of any kind may not participate in this activity. Guests with the following medical conditions may not participate in this activity: (a) pregnant or think they may be pregnant, (b) heart condition, (c) seizure condition, (d) history of back or neck injury, or (e) any other medical condition that prevents guest from following the safety rules and guidelines.

Physical Requirements

Age: 12+ years old or accompanied by an adult
Height: Between 48-78 inches / 122-198cm and able to reach to at least 66"
Weight: Between 50–250 lbs / 22-113 kg

Know Before You Go


Only closed-toed shoes and boots are allowed on the Canopy Run Zipline Tour. No sandals or flip-flops.


Wear longer shorts, pants or leggings (for more comfort with the harness). Short-sleeved and long-sleeved shirts are also more comfortable than tanktops due to the harness. Take off all necklaces and large jewelry before arriving at Snowmass.


If you bring your phone, store it in a securely zipped pocket. Should you drop your phone along the way, the guides will not be able to retrieve it.


Leave backpacks and extra items in the bin provided. Your harness needs to fit securely and your hands needs to be free, so superfluous items will be stored in a bin that will be brought to your group at the end of the tour. 


Use  the restroom before you go. There are restrooms in the Lost Forest check-in area. Be sure to use the facilities before you start the tour. You won't see another restroom until the end of the tour.

Water & Food

Bring a water bottle with a carabiner, a portable snack, sunscreen and sunglasses.
Cancellation Policy
Completely unused Lost Forest Base, Activity, or Sightseeing tickets are refundable. Lost Forest Canopy, Treeline, and Bonus Night Tickets require 48-hour cancellation notice. No refunds due to weather if operations remain open. No partial refunds.

Weather Policy
Summer weather in the Rocky Mountains is unpredictable and out of our control. As a result, we do not offer refunds due to weather impacts on our operation. Please check the forecast while planning your activities.