Dinosaurs once roamed here, and their remains are still visible embedded in the rocks. Today, mountains, desert, and untamed rivers flowing in deep canyons support an array of life. Petroglyphs hint at earlier cultures, and later homesteaders and outlaws found refuge here. It offers much to explore for those drawn to science, adventure, history, or scenery. The climate is semiarid, with temperatures averaging between 0°F and 30°F in January and 50°F and 100°F in July. Extreme winter low temperatures may reach -40°F, and summer highs can top 110°F. Elevations vary between 4,700 and 9,000 feet. Winter snow may be heavy at higher elevations, while only light to moderate snow falls at lower elevations. Summer thunderstorms may cause heavy downpours and localized flooding but fail to dampen parched soils less than a mile away.