Make an early start

Make an early start. Hike as much as possible of each day’s distance in the cool hours of morning (or evening), because summer afternoons are typically hotter in many mid-latitude mountain ranges and desert canyons, and heat amplifies your fatigue. Not everyone likes to wake up early, and your trip doesn’t have to feel like work; just find a balance between how much sleep you need and minimizing your exposure to afternoon heat. Get organized in camp with gear to facilitate a quicker morning departure – eating breakfast and packing up doesn’t have to take two hours.

Source: The Big Outside