This waterfall is nice shady respite from a long hike or bike on the Lafayette-Moraga Trail. A California Buckeye tree (Aesculus californica) has taken root.
The original tree was lost to a rockfall. 
Spend some time to enjoy it.
When the waterfall is flowing, this will be a challenging find/grab.
Congrats to jeremiahsjohnson for the FTF 