Hidden Lake is located immediately east of Hidden Lake Peaks in North Cascades National Park, in the U. S. state of Washington.

[2] Hidden Lake is off designated trails but can reached by way a trailhead off the Cascade River Road from Snoqualmie National Forest.

[3] The distance from the trailhead to the lake is 4.5 mi (7.2 km) one way to the overlook and another 0.8 mi (1.3 km) rock scramble through a boulder field to the lakeshore.

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