Rana muscosa 1975 4 Sept Calif: Tuolumne Co, Lukens Lake, YNP eluv. arrived at lake ~ 10 am (PDT), spotted 1 juvenile on piece of bark which I caught. One other juvenile seen on muddy area of bank but unable to catch. It difficult to spot frogs here because of nature of lake. Most shore off overgrown to grass and lake not shallow but drops off abruptly. ~6 inches. 5-6 ft. One end of lake bordered by ndw- is bit mucky & see. 1ge potholes (at least 4-5' deep; and 3 ft diameter) near edge of lake. One large indiv jumped into one of these & altho I could see where he had gone, was unable to reach him. At opposite end of lake (where is a stream outlet I think) are a # of large logs. H2O very shallow there (~6 inches) and there is at least an inch of silt on the bottom. Grasses also grew along edge's in H2O there. Saw 1 adult sitting in pool of ~2" H2O among grasses; was able to catch.