Koford, R. 1975 Journal Sagazer Creek Field Station, 6400ft. 3mi. NW Hobart Mills, Nevada Co., Calif. 17 October I left Berkeley at 1025 in a University car with Bonnie Bowen, Steve Thompson, Jim Menger, and Beverly McCarthy on a mammalogy class field trip to Segador Creek Field Station. We arrived in the early afternoon and set out traps until sunset. I set 15 traps in a meadow about 1/3 mile E of the field station, all Longworths. 6 were set in Rabbitbrush adjacent to the meadow, 4 in open grassland in Microtus runways, 2 on the south side of the creek in wet grass, 3 in tall grass under willows about 3 m. high, adjacent to the open meadow. Seven Longworths were also set north of the road, across from the meadow, at the bases of trees, mostly lodgepole pines. I also set one Tomahawk live trap near Woodruff sign about 1/4 mile S of the road going to the field station from Hwy 89. Steve Thompson set 2 more traps nearby. After sunset I set one more Tomahawk baited with peanut butter and about 1/4 mile W of the field station, a 25m N of the road. part of a cancerrA Sagazer basin is a couple miles long, with a creek flowing down the middle. The south-facing slope is covered with conifers - mostly lodgepoles with some Jeffery pines. There are wet and dry meadows in the floor of the valley, with some small willows. There are scattered brushfields, too, probably the result of past burns, both on the north and south slope. A large area of the north-facing slope had been burned several years ago and is coming back as brush and small conifers. I saw a couple patches of snow