Open all year, a fine day trip for hiking, picknicking, and photography. Try to visit before June! Fall and spring are the best times.
Attractions include 3,000 year-old Indian petroglyphs, amazing rock formations peppered with tiny caves, wide variety of desert wildlife, and walking upon areas unchanged since the dinosaur age.
Approx one hour north of Vegas. You can also take the scenic route upon return, making a circle around Lake Mead and Hoover Dam. Cell reception is minimal to absent in park.