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Lost Beagle

Issaquah Alps


Issaquah Alps -- Cougar Mountain
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0.6 miles, one-way


Gain: 250 ft.
Highest Point: 1470 ft.


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The Lost Beagle Trail is a connector Trail on Cougar Mountain. It does not have its own trailhead so hikers must reach this trail on foot from one of the many connecting trails. At its western terminus this trail connects to the Klondike Swamp Trail. At its eastern terminus it connects to the Harvey Manning Trail.

From west to east the Lost Beagle Trail starts right on Coal Creek and climbs for about 2.5 miles. Here a short spur trail takes off to the left and completes the ascent to Anti Aircraft Peak. Back on the Lost Beagle Trail, continue straight for another 0.2 mile to trail’s end.

Hikers departing from either the Sky Country Trailhead or the Harvey Manning Trailhead have the option to form any number of loops incorporating the Lost Beagle Trail.


Lost Beagle

Map & Directions

Co-ordinates: 47.5411, -122.0962 Open map in new window


Issaquah Alps -- Cougar Mountain

Lost Beagle (#COUGAR-N6)

King County Parks

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Getting There

The Lost Beagle Trail can be reached from the Harvey Manning Trailhead:
From I-90, take Exit 13 and drive south on Lakemont Blvd SE for 2.5 miles. Turn left onto SE Cougar Mountain Way, and follow the double yellow line around to the left as it becomes 168th Pl SE and around to the right to as it becomes SE 60th St. Turn off of 60th Street uphill onto SE Cougar Mountain Drive, a dead end road. The road will change to gravel - at the end is the trailhead.

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Lost Beagle

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