Trip
Ascending Hikes - Endurance – Boulder Open Space - Green Mountain
Let's ascend Green Mountain, Flagstaff Mountain and Mount Sanitas.
- Thu, Apr 16, 2026
- Ascending Hikes Section
- Hiking
- Adults
- Difficult
- Mileage: 15.1 mi
- Elevation Gain: 4,509 ft
- High Point Elevation: 8,134 ft
- Maximum Wind: 15 kts
- Pace: 2.0
- 5 (6 capacity)
- 1 (2 capacity)
- Cancellation & Refund Policy
This is a difficult hike as we ascend Green Mountain, Flagstaff Peak, and Mount Sanitas. This is a training and conditioning hike for the Boulder Skyline Traverse and the summer 14ers trips.
5:00am: Colorado Mountain Club, form carpools and depart by 5:15am. Arrive at the Chautauqua Park Trailhead by 5:45am, and depart by 6:00am. Anticipating finishing by 4:00pm.
Required Equipment
10 essentials - Leave No Trace principles.