We saw 12-14 Bighorn Sheep, some running through the meadow towards the river, and some up on the striated steep rocky cliffs—2nd photo. With binoculars, we saw three juveniles and several ewes on the cliff. They regularly traverse up and down this cliff to get to the Whitewater River and the grassy meadows below. Third photo was taken February 17, 2021 of 4 Bighorn Sheep in the meadow.

Desert Bighorn Sheep (Ovis canadensis ssp. nelsoni) is a subspecies of Bighorn Sheep (Ovis canadensis) that is native to the deserts of the United States' intermountain west and southwestern regions, as well as northwestern Mexico. The Bureau of Land Management considered the subspecies "sensitive" to extinction.
Desert bighorn sheep are stocky, heavy-bodied sheep, similar in size to mule deer. Weights of mature rams range from 115 to 280 pounds (52 to 127 kg), while ewes are somewhat smaller. Due to their unique concave elastic hooves, bighorn are able to climb the steep, rocky terrain of the desert mountains with speed and agility. They rely on their keen eyesight to detect potential predators, such as mountain lions, coyotes, and bobcats, and they use their climbing ability to escape.
Both sexes develop horns soon after birth, with horn growth continuing more or less throughout life. Older rams have curling horns measuring over three feet long with more than one foot of circumference at the base. The ewes' horns are much smaller and lighter and do not tend to curl. After eight years of growth, the horns of an adult ram may weigh more than 30 pounds. Annual growth rings indicate the animal's age. The rams may rub their own horns to improve their field of view. Both rams and ewes use their horns as tools to break open cactus, which they consume, and for fighting.
Diet of a Desert bighorn sheep is mainly grasses. When grasses are unavailable, they turn to other food sources, such as sedges, desert holly and cacti . As ruminants, grass-eating bighorn sheep have a complex four-part stomach that enables them to eat large portions rapidly before retreating to cliffs or ledges where they can thoroughly rechew and digest their food, safe from predators.
The desert bighorn has become well adapted to living in the desert heat and cold and, unlike most mammals, their body temperature can safely fluctuate several degrees. During the heat of the day, they often rest in the shade of trees and caves. Southern desert bighorn sheep are adapted to a desert mountain environment with little or no permanent water. Some may go without visiting water for weeks or months, sustaining their body moisture from food and from rainwater collected in temporary rock pools. They may have the ability to lose up to 30% of their body weight and still survive. After drinking water, they quickly recover from their dehydrated condition. Wildlife ecologists are just beginning to study the importance of this adaptive strategy, which has allowed small bands of desert bighorns to survive in areas too dry for many of their predators.
Desert bighorn sheep are social, forming herds of 8-10 individuals; sometimes herds of several dozen are observed. Rams battle to determine the dominant animal, which then gains possession of the ewes. Facing each other, rams charge head-on from distances of 20 ft (6m) or more, crashing their massive horns together with tremendous impact, until one or the other ceases.
Desert bighorn sheep live in separate ram and ewe bands most of the year. They gather during the breeding season (usually July–October), but breeding may occur anytime in the desert due to suitable climatic conditions. Gestation lasts 150–180 days, and the lambs are usually born in late winter. Desert bighorn sheep typically live for 10–20 years.
https://www.inaturalist.org/taxa/145539-Ovis-canadensis-nelsoni

"The Bighorn Sheep's compact body is muscular, with chocolate brown fur trimmed in white on the muzzle, rump, and belly. Most weigh 160 to 250 pounds (73 to 113 kilograms), but males may weigh more than 350 pounds (159 kilograms) and stand around 40 inches (102 centimeters) at the shoulder. Their wide-set eyes are situated well forward on the head, providing a wide arc of exceptional vision. The bighorn sheep's keen eyesight, hearing, and sense of smell help it detect and avoid predators.
The bighorn sheep is one of two species of wild sheep in North America with large horns, the other being the Dall sheep (Ovis dalli). The latest science shows that "bighorn sheep" is one species, with three living subspecies: the Rocky Mountain bighorn sheep (Ovis canadensis canadensis), the Sierra Nevada bighorn sheep (Ovis canadensis sierrae)—formerly called the California bighorn sheep, and the desert bighorn sheep (Ovis canadensis nelsoni).
Large, curved horns—borne by the males, or rams—can weigh up to 30 pounds (14 kilograms), as much as the rest of the bones in the male's body. Older rams have massive horns that can grow over three feet (0.9 meters) long with a more than one-foot (0.3-meter) circumference at the base. Females, or ewes, also have horns, but they are short with only a slight curvature. Both rams and ewes use their horns as tools for eating and fighting.
Although not as agile as mountain goats, bighorn sheep are well-equipped for climbing the steep terrain that keeps their predators at bay. The outer hooves are modified toenails shaped to snag any slight protrusion, while a soft inner pad provides a grip that conforms to each variable surface."
National Wildlife Federation https://www.nwf.org/Educational-Resources/Wildlife-Guide/Mammals/Bighorn-Sheep