What to Know Before Visiting U.S. National Parks This Summer

"This park operates a timed-entry reservation program during peak hours to reduce traffic and parking congestion; visitors typically need to reserve an entry window weeks to months in advance (or sometimes the day before), though early-morning, evening, or nighttime visits can often avoid the restriction. Because staffing and services can be limited, check the park website or app for real-time updates, arrive self-sufficient with water and supplies, and be flexible with timing." - 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