About This Route
Tioga Lake, elevation 9,705 feet right at Yosemite's Tioga Pass, is a tiny gem for ultra-high altitude scuba exploration. Park at the pass summit and hike 0.2 miles to shore; depths reach 30 feet with rocky bottoms and minimal life. Viz 10 feet max, temps 45-55°F. NPS stresses self-reliance; no amenities, buddy required. Adjacent to Tioga Road, it's quick access but exposed to elements. Divers report structure like logs, but low reward vs. risk; use for training only.
Safety Considerations
Peak altitude amps DCS risk; mandatory multi-day acclimation, RGBM-adjusted computers. Winds whip up fast; dive mornings only. Slippery volcanic rocks demand booties with grip. Per REI Co-op: plan no-deco to 20 feet max. Monitor blood oxygen; bail at altitude sickness signs. No cell service often; satellite messenger vital. NPS protocol: inform rangers of plans.
Essential Gear
Aqualung drysuit, Apeks regs, canister light, cookie cutter SMB, personal EPIRB locator.