"One of the highest-traffic parks this season, seeing record or near-record visitation that intensifies congestion at its most famous features and along major routes; visitor services such as ranger programs and shuttles may be reduced. Plan ahead for reservations or timed entries where applicable, visit popular attractions at off-peak hours if possible, and be patient and courteous with staff when crowds are inevitable." - Stephanie Vermillion Stephanie Vermillion Stephanie Vermillion is a travel journalist and photographer covering culture and adventure for Travel + Leisure Outside, and more. Travel + Leisure Editorial Guidelines