Mayhew 1958 Journal 60. Mar. 21-23 Salton Sea region, Calif. At 2:30 P.M. Friday, March 21, the Zoology 146 class (23 students attending), Ed Koo & Rudy Ruibal accompanied me to the west side of the Salton Sea near Truckhaven. We took the Truckhaven Trail toward Borrego, camping 8 miles west of Truckhaven. It began to rain very hard about 2 A.M. Saturday morning, and didn't stop until 5:30 A.M. Everyone that could got back into the station wagons & pick-ups to spend the rest of the night. The sun came out that morning, however, and dried everything out. We left Truckhaven about noon Saturday & proceeded to Highway 78, stopping due north of the junction of San Felipe & Carrizo Creeks (Marsh of San Sebastian). One half of the students accompanied me to the creeks while the other half ran temperature transects through mesquite dunes. Then we traded groups and repeated the operation. The creeks were quite high and terribly choked with silt from the heavy rains. This is the only time I have ever seen the Arroyo Salada and San Felipe Creek at