No bikes on Pacific Crest Trail. Small meadows along the trail offer high-elevation wildflowers, and the one commanding view overlooking Donner Lake is picture perfect. Summit Lake is modest and shadowed by large fir trees. Eastern Brook and rainbow trout fishing is often productive in spring and fall; stocked with rainbow (2000). The existing Donner Lake Rim Trail connects to the lake via the 4WD road approaching the lake from the east and Negro Canyon (Donner Lake exit off I-80). Undeveloped ORV camping sites adjacent to lake are popular.
Topographic map: Norden. Connect to the Pacific Crest Trail from trailhead, then head left (north). At sign, veer to (right) east shortly after passing through the tunnel under I-80. Continue to the signed Warren Lake Trail junction but turn right (east). Follow an additional 0.5 mile to the lake atop a high forested bench.