Ronto, Sean 2006 Journal Tributary of Cottonwood Creek, Adden Trout Wilderness, and Charlie Canyon, N Fork Oak Creek, clnyr Co., CA May 24 I hiked from the Cottonwood Canyon trailhead up Cottonwood Creek for a short distance before turning west and hiking upslope to a saddle at the top of the ridge. From here, I hiked west at a more-or-less constant elevation (a little uphill) up the canyon of the unnamed tributary of Cottonwood Creek where my data logger is. I saw a gopher snake (Pituophis catenifer) among lupine and shrubs in sparse pīnör vegetation (36.44137°N, 118.09500°W [WGS84; Gm acc.), 1926 m elev). I also saw many Uta, Aspidoscelis and ground squirrels. I continued west and descended to the creek about 150m before the waterfall where my data logger is, and hiked up to the waterfall through dense willow, cottonwood and oak. I arrived to find that my data logger was flipped upside down, though still attached to its pole, and its data port cap was on the ground beside it. I tried but failed to download data, and the LED wasn't blinking; so I took the logger with me. I searched the area of the waterfall and then climbed up the left side; this was extremely dangerous and I would never do it again. I walked upstream about 200m through the narrow rocky canyon, flipping rocks along the stream, [illegible] and I stopped at the point where the canyon opens up and widens. There was one area near the top on the N side where several springs emerged from a granite wall, forming a wet messy area with rocks laying