The Sespe Creek flows through habitas of the California montane chaparral and woodlands ecoregion, and Riparian woodlands.

The inaccessibility of the Sespe Creek backcountry, related to the Sespe gorge and flash floods which make roads through the gorge impossible to maintain, has made the area an apparent refuge for a number of species who were extirpated elsewhere in southern California, including the California condor, southern steelhead trout and possibly the California golden beaver.
In addition, the California grizzly bear (Ursus arctos horribilis) held out in the Sespe area until at least 1905, when a forest ranger reported tracks and separately hunters claimed they saw a grizzly in the vicinity of the Sespe Hot Springs and Alder Creek.

The Sespe is one of southern California's last free flowing southern Steelhead trout (Oncorhynchus mykiss irideus) streams.
The Sespe Creek flows through habitas of the California montane chaparral and woodlands ecoregion, and Riparian woodlands.
The inaccessibility of the Sespe Creek backcountry, related to the Sespe gorge and flash floods which make roads through the gorge impossible to maintain, has made the area an apparent refuge for a number of species who were extirpated elsewhere in southern California, including the California condor, southern steelhead trout and possibly the California golden beaver. In addition, the California grizzly bear (Ursus arctos horribilis) held out in the Sespe area until at least 1905, when a forest ranger reported tracks and separately hunters claimed they saw a grizzly in the vicinity of the Sespe Hot Springs and Alder Creek.
The Sespe is one of southern California's last free flowing southern Steelhead trout (Oncorhynchus mykiss irideus) streams.
Sespe Creek