Natural Resources and Climate for South Fork State Recreation Area
South Fork Reservoir occupies what was once a wide river valley covered with fertile meadows that were used for grass cover, hay production and grazing pasture. With the filling of South Fork Reservoir in 1995, these meadows were flooded and what is left for visitors to see are older river terraces with gentle to steeply sloping bluffs. Plants along these bluffs are abundant and include big sagebrush, black sagebrush, rabbitbrush, willow, grasses, sedges, rushes and forbs.
Noxious weeds have invaded many portions of South Fork Reservoir and efforts to eradicate weeds are continually underway by park staff. These efforts are complicated, time-consuming and will take many years to be successful.
Native trees are limited to narrow-leaf cottonwood, single-leaf pinyon pine and, in the southern portion of the park, Utah juniper. Efforts are underway to plant native trees throughout South Fork.
Waterfowl are common at South Fork, including mallard ducks, pintail ducks, green-winged teal, American widgeon, northern shoveler and common coots. Canada geese are also year-round residents. Mammals include Mountain mule deer, badgers, coyote, beavers and kit foxes.
The Ruby Mountains are 10-15 miles to the east and provide a scenic backdrop for the park, rising to 11,387 feet at Ruby Dome.
The area is typical of northeastern Nevada with arid, hot summers and cold winters. Temperatures are variable with highs around 90˚F in the summers, and lows of below zero possible during the winter.