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Blue Lake Ridge Trail leaves the trailhead on Road 23 and climbs steadily through dense conifer forests. The trail crosses several roads before coming to Blue Lake (at mile 3). The heavilyused trail proceeds along a rolling ridge, passing by Mouse Lake before descending to Trail No. 270. This trail has been reconstructed to ATV standards. A short section of the trail above Blue Lake is Hiker Only to minimize noise near the lake. Other users must use Jumpoff Trail No. 271A and Bishop Ridge Trail No. 272 to continue the loop. Blue Lake is at the headwaters of Blue Lake Creek. The lake was most likely created when a stream was dammed by lava flows from the Blue Lake Volcano, a cinder cone rising immediately west of the lake.
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