Lake Tahoe

Cold-water and Altitude Checklist

• Use an altitude-capable dive computer and keep profiles conservative. The lake sits around 1.9 km.
• Dress for immersion: drysuit or thick wetsuit, hood, and gloves. Plan a warm, windproof layer for surface intervals.
• Start early: afternoon winds can turn an easy entry into a difficult exit.
• Use a dive flag and assume boats may not see you.
• Plan exits: granite boulders can be slippery. Choose exits with safe footing and avoid forcing it when waves build.

Snorkel and Freedive Safety

• Cold water shock is real. Enter gradually and keep your first session short.
• Use a bright float and stay close to shore in busy areas.
• Never freedive alone. Use proper buddy and recovery protocols.

Practical Risk Reducers

• Check the lake forecast before every water session.
• Keep first-day dives shallow to acclimate to temperature and altitude.
• Avoid long surface swims. Choose sites with easy in-and-out options.

What to Do in an Emergency

• Call local emergency services first: 911.
• For water emergencies on Lake Tahoe, the Lake Tahoe Water Trail lists U.S. Coast Guard (530) 583-4433 as an emergency contact.
• For diving emergencies, after activating local EMS, call the DAN Emergency Hotline +1-919-684-9111 for coordination.

Nearby Hospital Care

Barton Memorial Hospital Emergency Department in South Lake Tahoe can provide emergency care. If you need definitive hyperbaric evaluation, DAN and local EMS are the best starting points for coordination and transport planning.