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On May 7, 2011, I participated in "botanizing trip" to Lake Calavera with Tom Chester, an amateur botanist who blogs on a Web site of his own at www.tchester.org.
I had surveyed this area on two previous occasions, first on March 21, 2010 and again on June 14, 2010. The marked-up topo includes markings from those two previous trips. I noticed some new trails, or at least some newly signed trails, including one to the nearby Oak Riparian Park.
We entered Calavera Lake Preserve from a trailhead near the intersection of Tamarack Ave. and Strata Dr. This is one of a number of possible entry points.
The principal purpose of the trip, from my point of view, was to survey the trail along the east side of the lake.
Transcript of survey.
Data plotted on topo
Philip J. Erdelsky