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Thunder Creek–Fourth of July Pass


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Thunder Creek–Fourth of July Pass

Thunder Creek/Fourth of July Pass is a strenuous, 10.5 mile round-trip day hike with 2,300 ft in elevation gain. The trail goes up Thunder Creek before cutting up steeply through forest to Fourth of July Pass.

getting there

Drive SR 20 to Colonial Creek Campground in the North Cascades National Park.

on the trail

Travel from Thunder Arm of Diablo Lake, along Thunder Creek for 1.5 mi. Turn left and take the Fourth of July Trail to Fourth of July Pass.

information for leaders

Courses, paid clinics, staff-led programs, and course field trips require a Commercial Use Authorization. The Park typically accepts applications for 2-year CUAs  through mid-March each year, and CUA's are activity-specific. Please contact info@mountaineers.org if you would like to apply for a CUA for a field trip or paid clinic for an activity we do not already have a CUA for. Please follow all Mountaineers group guidelines when leading trips or courses in North Cascades National Park. 

Notes:

  • Leaders are responsible for securing backcountry permits or other required permits even if  we have a CUA.
  • Leaders must have all relevant CUAs with them in paper or electronic copy to show Parks Staff as requested. 
  • All Hiking course field trips or paid clinics must have a First aid and CPR certified leader. Current (non-expired) certificates must be uploaded to the park web portal by Mountaineers staff prior to the trip
  • All mountaineering field trips or paid clinics must have a WFR-certified leader and a leader with documented climbing certifications (an AMGA certification OR Mountaineers climb leader with a recent resume of training and experience). Both qualifications must be uploaded to the park web portal by Mountaineers staff prior to the trip

View list of current North Cascades CUAs

  • Suitable Activities: Day Hiking
  • Seasons: April, May, June, July, August, September, October, November
  • Weather: View weather forecast
  • Difficulty: Strenuous
  • Length: 10.5 mi
  • Elevation Gain: 2,300 ft
  • 3,600 ft
  • Land Manager: North Cascades National Park
    Ross Lake National Recreation Area
  • Parking Permit Required: None
  • Recommended Party Size: 12
  • Maximum Party Size: 12
  • Maximum Route/Place Capacity: 12
Map
  • Green Trails Diablo Dam No. 48
  • Green Trails Mt Logan No. 49
  • Trails Illustrated North Cascades National Park
Activities
Trip Reports
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