As of January 1, 2020, late exit climbing and high-country backpacking permit requests at Red Rock Canyon National Conservation Area have moved to Recreation.gov. Permits are no longer available by calling the phone line that was used previously (702-515-5050). You can request a permit by clicking the “Buy a Pass” button on the website. Late exit permits are free, but a 50-cent processing fee will be charged.
The permits allow for late exit (up to two hours after the normal closure time) for multi-pitch routes but do not allow for entrance into the Red Rock Canyon National Conservation Area fee area (Scenic Drive). There is a separate fee, payable at the Fee Station, for entrance into the Scenic Drive. The late exit permit also does not cover camping fees in the campground.
The direct link to acquire a permit on Recreation.gov is https://www.recreation.gov/sitepass/74977
For more information regarding rock climbing, high-country backpacking, or using the late exit permit system, please visit the Bureau of Land Management’s website: https://www.blm.gov/nevada/red-rock-canyon-nca/recreation