Cogswell 1950 "Journal" 6 Disney Peak (cont.) VISITS: June 20, 22, 24, 26 (twice); July 1, 3, 7, 13, 17, 20, 25, 27; Aug. 2, 3, 8, 10, 14. Donner Lake, 5930 (-6100 ft. on trips around it), 3 to 6 mi. W Truckee, southern Nevada Co., Calif. -- areas from which observations are recorded are the sandy valley at W. end (inlet) of lake, and the dirt road steep mountainside immediately S of lake. VEG. TYPES: W. end -- coniferous forest (Pinus murrayana, in solid stand on older alluvium, mixed with Pinus jeffreyi on rockier borders and in present stream flood area); riparian woodland (scarcely de- veloped, the Populus tremuloides trees being only dis- continuously present along stream & with conifers every- ywhere admixed, a few Populus trichocarpa near SW & NW corners of lake); riparian thickets (Salix sp., Cornus californicus) and grassland (narrowly, along stream flood plain only). S. side -- coniferous forest (Abies concolor, Abies magnifica, Pinus murrayana, Pinus jef- freyi) with well developed understory on most (moist) slopes (Populus tremuloides in draws & over seepages, Ceanothus cordulatus, Prunus emarginata, Ribes sp., etc). Forest at SE end of lake (on flat) is similar to that at W. end. VISITS: W. end -- June 24; Aug. 10 S. side -- July 4; Aug. 10, Aug. 11 Donner Pass, 7135 ft. (7189 just N of Highway 40), on Nevada Co.--Placer Co. line, Calif. -- between Secs. 16 & 21, R 15 E, T 17 N. Donner Pass, 1/2 mi. E of, 6500-6600 ft., on Co. line yet. VEG. TYPES: large rounded (glaciated) granite out- crops with scattered trees & shrubs (Pinus jeffreyi, Pinus murrayana, Juniperus occidentalis, Arctostaphy- los nevadensis, A. patula, Ceanothus cordulatus, Spi- raea densiflora, Populus tremuloides near stream); the shrubs forming almost solid chaparral at base of large talus slope just above where I observed (below So. Pac. R.R. tracks) (Lloyd Ingles & Ferd Ruth saw & heard Ochotona princeps on this talus slope; but I did not). VISIT: July 30 (plus driving past this general area on all "Donner Pass to Reno" trips & those to Boca Reservoir & Lake Tahoe, Donner Lake, & Truckee). Donner Pass, "just" N to 1/3 mi. N of, 7200 ft., Nevada Co., Calif. -- for description of veg. see Angela L. VISITS: July 7, 8, 13; Aug. 3