Atlantic Peak

Trip

Mountaineering – Atlantic Peak

This is a ACS ridge climb for ACS students in B3 group 2026

  • Sun, Apr 19, 2026
  • Technical Climbing Section
  • Mountaineering
  • Intermediate Alpine Climb
  • Adults
  • Moderate
  • Mileage: 5.5 mi
  • Elevation Gain: 2,800 ft
  • High Point Elevation: 13,841 ft
  • Pace: 1kft and hr

This is a class hike for team B3 ACS students 2026

check route, weather and snow/avy conditions

Weather and Conditions on Trip Day

  • NOAA Point Forecast: 4 Miles NNE Kokomo CO, 39.44°N 106.17°W (Elev. 10715 ft)
  • NOAA Hourly Forecast
    • SpotWX Forecast for 39.41419, -106.14850 (Elev. 11,507 ft)
      • 10-Day Forecast: 10°F at 6 a.m., rapidly warming to 30°F by 9 a.m. and a high of 45 at 3 p.m. Light winds. No precipitation likely. 
    • MountainForecast for nearby Fletcher Mountain (Elev. 13,950 ft.) 
      • Base: 
        • Max / Min / Chill for AM: 37° / 30° / 25° | Winds: 5 mph
        • Max / Min / Chill for PM: 39° / 37° / 30° | Winds: 15 mph
      • Peak:
        • Max / Min / Chill for AM: 28° / 21° / 10° | Winds: 10 mph
        • Max / Min / Chill for PM: 28° / 27° / 16° | Winds: 20 mph

    Avalanche Forecast

    CAIC

  • Navigation Route and Details: 

    • Length: Approximately 5.4 miles
    • Elevation gain: 2,900 ft
    1. Starting elevation: 10,991 ft  
    2. Highest Elevation: 13,841 ft
  • Maps
  1. AllTrails
  2. CalTopo
  • Compass declination: 8.20° E  ± 0.35°  
  • Meeting Place & Transportation

    • Meeting Place: Wooly Mammoth Park-N-Ride, Golden, CO @ 5 AM
      • Address: 18560 US-40, Golden, CO 80401 | Link to location
      • Meet in Section AA (South end of lot, across from the Exxon Station - Open 24hrs, bathroom if needed)
    • Departure: 5:05 AM
    • Estimated Drive Time to Trailhead: 1 hour 10 minutes
    • Drivers: See the yellow-highlighted names in “The Team” table below
    • Directions to Wooly Mammoth Park-n-Ride from I-70 W:
      • Exit 259 toward Jefferson Cnty 93/Morrison.  Right at end of the ramp.  Left at the next light onto Rte 40.  Park and Ride is approx ½ mile on the left. 

    Trailhead

    • Mayflower Gulch Trail
    • GPS Directions from Wooly Mammoth: Google Maps | Apple Maps
    • Directions to Mayflower Gulch Trail from Wooly Mammoth: 
      • Get on I-70 W.  Take exit 195 for CO-91 S toward Copper Mountain/Leadville. Continue onto CO-91 S. Trailhead will be about six miles down on the left, across from the Mayflower Tailings Pond.
    Route/Place
    Roster
    Required Equipment

    Required Equipment

    Gear

    • Be prepared for full winter conditions. Even if the temp is forecast to be moderate, wind can make it feel like deep winter.
    • Winter Clothing:  Winter gloves, winter pants, winter/waterproof jacket, balaclava, goggles or glacier glasses, gaiters, etc.
    • Technical Gear Required: Snowshoes, mountaineering/winter boots, crampons and/or spikes, ice axe with locking carabiner (not a wrist leash), helmet, climbing harness. 
    • Winter 10 Essentials and day pack

      Please bring a change of shoes and plastic bag for your boots so you don’t muddy your driver’s car.
    Trip Reports