The Cathedral Valley District of Capitol Reef National Park is open all year. Vehicles with high ground clearance, even those without four wheel drive, can usually negotiate the roads without difficulty. However, road conditions can vary greatly depending on recent weather conditions. Spring and summer rains and winter snows can leave the roads muddy, washed out, and impassable to the best high-clearance four wheel drive vehicle, so check at the visitor center for current road and weather conditions before visiting Cathedral Valley.
Foot and vehicle travel in the Cathedral Valley area is light, so be prepared for the unexpected. If you have problems, help may not arrive for hours or even days, depending on the time of year. Carry plenty of water, food, gas, adequate clothing, a shovel, and emergency supplies. Cool or cold temperatures will accompany sudden storms or an unexpected night out in the backcountry. Daytime temperatures in the summer may reach the upper 90s°F (30s °C) and winter highs may stay below freezing, so prepare accordingly.
Cathedral Valley presents another chapter in the story of Capitol Reef's geology. The geologic layers and eroded features here are different than those seen in other sections of the Waterpocket Fold. The Bentonite Hills among the Hartnet Road and the Painted Desert on the Cathedral (also known as the Cainville Wash) Road appear as softly-contoured, banded hills in varying hues of brown, red, purple, gray, and green. The hills are composed of the Brushy Basin shale member of the Morrison Formation. This layer was formed during Jurassic times when mud, silt, fine sand, and volcanic ash were deposited in swamps and lakes. Bentonite clay (altered volcanic ash) absorbs water and becomes very slick and gummy when wet, making vehicle or foot travel difficult or impossible.