Summary
This is an
ideal trail for a short walk, a long day hike, or an extended backpack.
Along the Thunder Creek Valley are ancient forests, streamside openings,
and, from higher points, magnificent views. A recommended walk is to the
junction with Fourth of July Pass Trail at 1.7 miles (2.7 km). Following
Fourth of July Pass Trail up 3.2 miles (5.1 km) of switchbacks to Fourth
of July Pass, or continuing along Thunder Creek for about the same
distance provides beautiful mountain views. Thunder Creek Trail divides
again 9.7 miles from the trailhead to go up Fisher Creek and Easy Pass
(11.3 miles/18.2 km further) to exceptionally fine meadows and vistas, or
climbs to Thunder Basin and over Park Creek Pass (9.3 miles further) and
on to the Stehekin Valley. Descriptions for Diablo and Colonial Creek area
day hikes and Easy Pass are on separate handouts.
Access
Follow State Route 20 to Diablo Lake. Enter the south side of Colonial
Creek Campground at milepost 130. Park in the lot above the boat ramp. One
of the two trailheads for Thunder Creek Trail lies uphill from the parking
lot behind the trailer dump station. This is the preferred trailhead for
horses. To reach the other trailhead, walk the length of the campground,
following the signs to the amphitheater. The main trailhead is marked by
an informational display nearby.
Thunder Arm
The first half mile (.8 km) follows Thunder Arm of Diablo Lake. Note
the colors of the lake and stream. This is because Thunder Creek carries a
heavy load of "rock flour," ground by the many glaciers of its
headwaters. This trail was opened by prospectors and trappers. Mining
developers and the USFS made major improvements in the early 1900s. Look
for old blazes, telephone insulators, and a few cut stumps along the way.
At 300 yards (90 m) from the trailhead, a spur leads to Thunder Woods
Nature Trail, a self-guided intrepretive walk along a 0.9 mile (1.4 km)
loop. At .8 miles (1.3 km), a modern suspension bridge crosses at the
historic bridge site.
Forest Fires
The trail winds through some exceptionally large old cedar and fir
trees. Forest flowers abound in season. This is the home of many birds,
including owls and woodpeckers. Look for deer and other animal tracks in
the sandy soil and mud.
Old Forest
Along Thunder Creek Trail, the first open view is from a 1970 burn at
about 4.5 miles. Here an emerging forest of young Douglas-fir and a
profusion of seed bearing herbs and shrubs attracts birds, rodents and
their predators. Across the valley, note a newer burn from lightning
strikes in 1990. Rock cliffs and McAllister Glacier provide natural fire
breaks and a splendid backdrop for this evolving forest scene.
Campsites
Short spur trails to Thunder Camp and Neve Camp branch off at 1.4
& 1.9 miles (2.3 & 3 km) from the trailhead. McAllister Camp at
6.2 miles (10 km) is a popular overnight destination. It is in a forested,
creekside setting isolated across Thunder Creek from the main trail.
Tricouni Camp lies 1.3 miles (2.1 km) beyond McAllister.
The Junction
A relentless 2.2 mile (3.5 km) climb from the valley bottom at
Tricouni Camp leads to Junction Camp and a major trail junction. From this
high ridge, enjoy an expansive view of Boston Glacier and Tricouni Peak.
From here, one may either take Fisher Creek Trail to Easy
Pass, or continue on Thunder Creek Trail to Park Creek Pass. Both ways
lead to grand trail experiences.
Mining History
From Junction, Thunder Creek Trail drops steadily for 2.6 miles (4.2
km) into the valley through stands of old fire-scarred Douglas-fir and
even-aged lodgepole pine. Then, a steep 1 mile (1.6 km) climb through
silver fir forests brings the hiker to Skagit Queen Camp. Just beyond the
camp are relics of early 1900s mining development. The water-powered
generator ran an air compressor which supplied piped compressed air to
drill rigs up Skagit Queen Creek. Look for signs of mining activity
further along the trail. Much effort and money was expended before
developers left this remote and rugged land.
Thunder Basin
Above Skagit Queen, the trail rises steeply for a mile (1.6 km) into
the mouth of Thunder Basin, a hanging glacial valley. More hiking through
avalanche paths and stands of silver fir leads to the fringes of the
subalpine zone where Thunder Basin Camp is located, 2.9 miles (4.7 km)
beyond Skagit Queen.
Park Creek Pass
The trail continues its climb 2.6 miles (4.2 km)through steep meadows
and snowfields to the pass (6,100 ft/1860 m), a notch between Mt. Logan to
the northeast and Mt. Buckner to the southwest. Total distance from
Colonial Creek Campground to the pass is 19 miles (30.6 km). An ice axe
is recommended for travel on steep snow through mid-summer. The
subalpine meadows surrounding the pass have been eroded from past uses.
With camping restrictions in these fragile meadow areas, the
delicate plant life is beginning to recover. Camp in designated sites
only.
To Stehekin Valley
From Park Creek Pass, the trail descends quickly through heather and
wildflower meadows into a hanging valley and Buckner Camp. Contouring down
the forested slopes of Park Creek Valley, the trail intersects the
Stehekin Valley Road 7.9 miles (12.7 km) from the pass at 2,300' (700 m)
elevation. Check schedules and make a reservation in advance to
take the Park Service shuttle bus to Stehekin Landing.
Permits/Information
Pets and firearms are prohibited in the National Park. Pets are
allowed on leashes only in Ross Lake National Recreation Area. Fires are
allowed in some low elevation camps. Washington State fishing regulations
apply. Be sure to stop at the Wilderness Information Center in Marblemount
(360-873-4500 ext. 39). A permit (no charge) is required for all overnight
stays in the backcountry. Rangers have maps and current information to
assist you in planning a safe, fun trip.
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