The Forest Service did not study the Nacimiento River. Conservationists believe the river is free flowing and possesses outstanding values.
Outstanding Values:
Recreation — The Nacimiento Fergusson Road makes the Nacimiento River one of the few streams in the mountain range easily accessible for recreation, including scenic driving, hiking, swimming, angling, and camping. Two roadside Forest Service campgrounds provide good opportunities to explore the river.
Wildlife — The Forest Service identified the Nacimiento River as supporting a highly significant population of endangered arroyo toad.
Botanical — The Nacimiento supports some of the southernmost stands of rare and endemic Santa Lucia Fir in the mountain range.
Comments:
The Recreational segment accommodates the Nacimiento Road and the two adjacent campgrounds. Although it flows into Fort Hunter Liggett, none of the segments of the Nacimiento River proposed for designation are located on the military reservation. The river corridor can and should be established by the Forest Service after designation to avoid overlap with the military reservation on the northeast side of the river and Nacimiento Road. Designation will not affect military water rights to the river. Virtually all of the water in the Nacimiento River is captured by the Nacimiento Dam and Reservoir for agricultural and municipal use. Designation of upstream segments on the National Forest will not affect the dam, reservoir, or water uses.
Segmentation/Classification:
| Segment 1 | Source to Ventana Wilderness boundary | 3 miles | Wild |
| Segment 2 | Ventana Wilderness boundary to National Forest boundary | 6 miles | Recreational |
| TOTAL | 9 miles | ||
Nacimiento River