 The creek also has a few tributaries that provide the outflow for several water supply and flood control reservoirs in the San Joaquin Hills and Santa Ana Mountains.From source to mouth, these are La Cañada Channel (fed by Laguna Reservoir), Bee Canyon (two unnamed reservoirs), Peters Canyon Wash (Peters Canyon Reservoir), San Joaquin Wash (San Joaquin Reservoir) and Sand Canyon Wash (Sand Canyon and Strawberry Valley reservoirs).The largest sub-tributaries include Borrego Canyon Wash (to Agua Chinon Creek), Round Canyon (to Bee Canyon Wash), Santa Ana-Santa Fe Channel (to Peters Canyon) and Culver Drain (to San Joaquin Wash).