From October to May, the park requires a Timed Entry Reservation between the hours of 8 am and 5 pm.
Entering the park before or after these hours (i.e., 6 am for sunrise) does not require a timed reservation. Once you are in the park, you do not have to leave. However, if you leave, you will need a reservation to re-enter the park during those hours.
In summer, reservations are not needed because honestly, it’s just too hot. The park doesn’t get that busy and those who visit, don’t stay that long.
Reservations can be made online through the Red Rock Canyon BLM website. Unfortunately, there is a $2 fee, even if you have a pass.