J. Rodgers - 1939 Itinerary, etc. April 9. Black Hawk Ranch, 4½ miles E Mt. Diablo, Contra Costa Co., Calif. The point and west of us we could see a dam in the canyon above the mansion and the garage where we left the car. Beyond this, to the SW, a ridge of hills covered hid most of the San Ramon Valley (To the north of this ridge, we could see a valley in the distance that we judged to be to the west) Walnut Creek). In the distance to the west and southwest we could see the Berkeley Hills (name?); over then in a clear plane we could see San Francisco Bay. South of these hills, cutting them off from the Mt. Hamilton range, the deep canyon of Alameda Creek. Directly south of us, across the Livermore Valley, in the Mt. Hamilton Range, we could see the deep cut of Arrow's Mocks in which lies the head of Alameda Creek (no! the creek lying in Arrow's Mocks is a branch of Alameda Br., they coming together just east of Miles Canyon. An extension of the hills of the Mt. Hamilton Range, connects with an extension of the hills of the Mt. Diablo Range around