Overview
Lost Lake sits at 1,900 feet in an open alpine bowl above the spruce forests of the Kenai Peninsula, reached by a 16-mile loop that connects two trailheads along the Seward Highway. The trail climbs from near sea level through dense coastal rainforest and subalpine brush, breaks out above treeline into tundra meadows, passes the lake, and completes the loop via a second route back to the valley floor. This is one of the most complete Alaska hiking experiences available on a day hike or weekend backpack.
The forest sections reflect Chugach's coastal rainforest character: massive Sitka spruce, heavy moss, alder tangles, and wet trail surfaces even in dry weather. Above treeline, the character changes entirely to open tundra with 360-degree views of the surrounding mountains and occasional glimpses of Resurrection Bay below. The contrast between the two environments on a single loop is part of what makes Lost Lake Trail stand out compared to trails that stay in one ecological zone throughout.
Chugach National Forest manages this trail as part of the broader Seward area trail system. The Seward Ranger District is the contact for current conditions. Before any backcountry trip, check the conditions guide for tools to verify trail status, fire conditions, and weather forecasts. Leave No Trace practices are important here, particularly around the lake where camping pressure concentrates.
The Route
Miles 0 to 4: Lower Forest Climb
Starting from the main Lost Lake Trailhead at Milepost 5.3 of the Seward Highway, the trail enters Sitka spruce forest immediately and begins climbing. The first four miles gain the bulk of the route's elevation, climbing through old-growth forest with good views blocked by trees but excellent habitat for thrushes, woodpeckers, and bears. Roots and mud are common on this section. Trekking poles help on steeper pitches.
Miles 4 to 8: Alpine Zone and Lost Lake
The forest thins and the trail enters open tundra as the route climbs above 1,500 feet. Views expand across the Resurrection River valley and toward the Kenai Mountains. By mile 7, the trail reaches Lost Lake in its alpine bowl. The lake is cold, clear, and ringed by low tundra vegetation. Dispersed camping is concentrated on the drier benches above the lake's north shore. This is the turnaround point for hikers doing an out-and-back to the lake from either trailhead; the loop continues east.
Miles 8 to 16: Primrose Loop and Return
The loop's second half descends toward the Primrose Creek drainage via a different ridge and valley. Terrain is less defined in places and requires more route-finding than the initial climb. The descent through the Primrose area moves back into spruce-alder forest before reaching the Primrose Trailhead, which sits at roughly Mile 17 of the Seward Highway, about 12 miles north of the main trailhead. A car shuttle between the two trailheads simplifies logistics if you are not doing a strict loop return.
When to Visit
July and August are the peak months for pleasant weather, reliable trail conditions, and full trail access. June offers longer daylight and good wildflower displays but may have lingering snow on the upper section. Late August brings the best berry picking (blueberry and crowberry abound above treeline) and early fall color. September is beautiful but increasingly cold and rainy, with snow possible above 1,500 feet.
Coastal Alaska weather affects this trail significantly. Fog and low cloud are common even when Anchorage is sunny. Waterproof gear is essential. Mosquitoes are heaviest in the lower forest sections from late June through mid-July. See the checking conditions guide for current forecasts and trail updates.
What to Bring
- Bear spray, worn accessible. Bears frequent this trail regularly.
- Bear canister or approved hanging system for food and scented items if camping.
- Rain gear (jacket and pants). Full waterproofing is standard for Alaska hiking.
- Trekking poles for rooted forest terrain and stream crossings.
- Navigation tools: downloaded GPS track and a topographic map. The alpine section has no cell service.
- Many hikers carry 2-3 liters of water capacity; individual hydration needs vary. Water is available from streams throughout but treat before drinking.
- Head net for early and midsummer hiking in the forest sections.
- Warm layers including insulation: temperatures above treeline can drop to the low 40s even in July.
- For overnight trips, a freestanding tent rated for rain is strongly recommended over tarps in exposed alpine camping.
Practical Details
No permits are required for hiking or backcountry camping on the Lost Lake Trail as of 2026. Camping is dispersed and free. Dogs are allowed but must be under control; bears and moose on the trail create genuine hazards for unleashed dogs.
Vault toilets are at the main trailhead. No facilities exist on trail. Human waste must be buried or packed out in accordance with Leave No Trace principles. All food and trash should be stored properly at all times. Review bear canister requirements and Leave No Trace principles before the trip.
Water from streams along the trail should be filtered or treated before drinking. Giardia is present in Kenai Peninsula water sources.
Getting There
From Seward, drive north on the Seward Highway approximately 5 miles to the signed Lost Lake Trailhead on the right (east) side of the highway. From Anchorage, drive south on the Seward Highway approximately 122 miles. The Primrose Trailhead for the loop's second end is at Milepost 17 of the Seward Highway, about 12 miles north of the main trailhead.
A car shuttle between the two trailheads is the most convenient way to complete the full loop without backtracking. Alternatively, camp at the lake and return the way you came for a 14-mile out-and-back.