Thorn Lake has been dry for many years, Doctor E. D Cope, a scientist traveling through the area in 1889, noted that Thorn Lake was a dry playa at that time. A 2008 topographic map of Oregon indicates that Thorn Lake is dry. The lake is about east of the unincorporated community of Silver Lake and about north of the intermittent lake called &quot;Silver Lake&quot; near Oregon Route 31.

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