About This Route
The Mirror Lake Trail in Yosemite Valley leads to a seasonal lake (often a pond by summer) famed for reflections of Half Dome. A flat, 2-mile round-trip paved path from shuttle stop 17 makes it family-friendly, with swimming spots along Tenaya Creek feeding the lake. NPS discourages swimming due to shallow, silty bottoms and currents, but visitors wade and swim cautiously. Peak season offers glassy waters mirroring peaks; hike early to beat crowds. Note: the lake shrinks dramatically, exposing mudflats hazardous for footing.
Safety Considerations
Deceptive calm hides swift undercurrents from Tenaya Creek, capable of pulling waders into deeper channels, as warned by NPS swiftwater rescue teams. Water is frigid at 45-55°F, risking hypothermia during prolonged play. Slippery algae-covered rocks cause slips; muddy bottoms suck off shoes. Avoid post-rain swims when flows surge. No lifeguards patrol; drownings have occurred nearby. Children require constant supervision and PFDs. Flash floods from valley storms fill the basin rapidly. Follow REI advice: test water depth before entering. Leave No Trace means no feeding ducks or littering.
Essential Gear
Aquasox water shoes, compact PFDs for kids from Mustang Survival, waterproof phone case, and trekking poles for stability on mud.
Emergency Tips
If dragged by current, float aggressively to rocks. Shout for valley crowds to dial 911. Mud entrapment: distribute weight and back out slowly. Seek valley clinic for injuries.