The paved Wheeler Peak Scenic Drive climbs more than 4,000 feet and has steep grades and tight curves. It usually closes in winter and opens when snow conditions allow, often around Memorial Day. Vehicles longer than 24 feet must turn around at Upper Lehman Creek Campground. At the trailhead, use designated parking; vault toilets are available, but there is no potable water along the scenic drive. Bring water, a salty snack, sun protection, and layers. The high elevation can cause altitude sickness, and afternoon storms can build quickly; descend if you develop symptoms. Dogs are not allowed on park trails.