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.
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).
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
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.
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
Water & Food
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.
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.