Killen Creek Trail

The difficulty of the Killen Creek Trail varies. The main section leading to the Pacific Crest Trail (PCT) is about 3.1 miles one-way with a gradual uphill climb through a dense, shaded forest, generally considered moderate. However, continuing to High Camp adds another mile of much steeper, rockier terrain with loose scree, making it significantly more challenging. The trail transitions from dusty forest paths to open meadows with wildflowers, and then to rocky, alpine sections as you gain elevation.

The trail offers stunning scenery, including spectacular wildflower displays in mid-summer to fall, featuring lupine, paintbrush, aster, and heather. You'll also get fantastic views of Mount Adams directly ahead, and glimpses of Mount Rainier to the north and Mount St. Helens in the distance. From High Camp, there's a close-up view of the impressive Adams Glacier.

The Killen Creek Trail is primarily an out-and-back route. It leads to a junction with the Pacific Crest Trail (PCT) and can be extended to High Camp, but it does not form a loop on its own.

Parking is available at the Killen Creek Trailhead. Be aware that a Northwest Forest Pass is required for parking at the trailhead.

The best time to hike the trail is typically from mid-summer through fall. This period offers the most vibrant wildflower displays and generally clear conditions. Snow can linger late in the season in the upper reaches, especially towards High Camp.

Yes, a Northwest Forest Pass is required for parking at the trailhead. Additionally, wilderness permits are necessary for hiking in the Mount Adams Wilderness, which should be carried with you.

The trail is generally dog-friendly, but dogs must be kept on a leash as it is located within the Mount Adams Wilderness, part of the Gifford Pinchot National Forest. Always practice Leave No Trace principles and pack out all waste.

Yes, the Killen Creek Trail #113 connects with the Pacific Crest Trail (PCT) - Washington Section H. You may also encounter sections of the Killen Connector Trail #113A and the Old Cascade Crest Trail.

During the early to mid-season, mosquitoes and biting flies can be quite active, so come prepared with insect repellent. Snow can persist in the higher elevations late into the season, potentially requiring navigation skills, especially on the way to High Camp.

The trail is renowned for its spectacular wildflower displays, particularly from mid-summer to fall. You can expect to see a variety of species, including lupine, paintbrush, aster, and heather, especially in the open meadow sections.

As part of the Gifford Pinchot National Forest, the Mount Adams Wilderness requires hikers to carry wilderness permits. Standard wilderness regulations apply, including Leave No Trace principles, proper waste disposal, and keeping dogs on a leash. Always check the latest regulations on the USDA Forest Service website before your trip.