Thousand Island & Ediza Lake Loop

Banner Peak reflected in Thousand Island Lake is the Sierra's most iconic image, and you can see it on a three-day weekend from Mammoth.

Sierra NevadaAnsel Adams WildernessModerate3 daysLoop
Miles
25
Elev gain
3,700 ft
Peak
9,833'
Best months
Late Jun - Sep

Description

Banner Peak reflected in Thousand Island Lake is one of the Sierra's most iconic images, and you can see it in person on a 3-day weekend trip from Mammoth Lakes. This loop connects Ediza and Thousand Island Lakes (two of the most photogenic in the range) via sections of the JMT and PCT. The Minarets skyline is dramatic from every angle.

Trailheads

Start: Agnew Meadows (shuttle from Mammoth Mountain)
End: Agnew Meadows

Logistics

  • Permit required: Yes (Inyo NF - recreation.gov. Multiple trail permits: Shadow Creek Trail (clockwise), River Trail or High Trail (counter-clockwise). Very competitive permits.)
  • Bear canister: Required
  • Shuttle required: Yes

Key features

  • iconic alpine lakes
  • Banner Peak & Mt Ritter views
  • Minarets
  • JMT/PCT sections
  • wildflowers
  • fishing

Day by day

Day 1
Agnew Meadows TH (8,340ft)Ediza Lake (~9,300ft)
7.5 mi1,250 ft gain

Water: Shadow Creek, Olaine Lake, Shadow Lake, Ediza Lake

Clockwise route recommended. Shadow Creek Trail past Olaine Lake. Switchbacks with waterfall views up to Shadow Lake. Continue on JMT north to Ediza Lake junction (0.7mi past Shadow Lake). Turn right, 2.3mi to Ediza. Camp on north/west side (NOT east/south - restricted). Views of Minarets, Mt Ritter, Banner Peak.

Day 2
Ediza LakeThousand Island Lake (~9,833ft)
8 mi1,150 ft gain

Water: Garnet Lake, Ruby Lake, Emerald Lake, Thousand Island Lake

Morning side trip to Iceberg Lake (2mi RT from Ediza - don't miss it). Then JMT south past Garnet Lake (switchbacks between), Ruby and Emerald Lakes to Thousand Island Lake. Camp on north shore for classic Banner Peak reflection views. No camping within 1/4mi of outlets at Garnet or Thousand Island.

Day 3
Thousand Island LakeAgnew Meadows TH
8.5 mi-1,500 ft gain

Water: Limited water on High Trail section; fill up at lake

Return via PCT High Trail (east). Stunning exposed ridge with panoramic views of Ritter Range and San Joaquin valley. Very little shade - hot days are tough. Passes River Trail junction. Descend back to Agnew Meadows. Catch shuttle back to Mammoth Mountain parking.

Side trips

Iceberg Lake from Ediza (2mi RT, highly recommended); Clark Lakes from Thousand Island (day hike via Agnew Pass); Garnet Lake as additional camp (split into 4 days for more relaxation); Nydiver Lakes (cross-country from Ediza, experienced)

Notes

SHUTTLE REQUIRED: Mandatory shuttle from Mammoth Mountain Adventure Center to Agnew Meadows (Stop #1) during summer season (Jun-Labor Day, 7am-7pm). Before 7am you can drive in ($10 fee). Overnight parking at Mammoth Mtn lot (free, but remove scented items). Bear lockers at Agnew Meadows parking. No campfires at any lakes or above 10,000ft. Bugs legendary in Jul - bring serious bug protection. Reds Meadow Resort one shuttle stop away for supplies. Dogs allowed in Ansel Adams Wilderness.

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