About This Dive Site
The Spire Fields in Yellowstone Lake, mapped by local divers, stun with towering geothermal formations rising from the 390-foot depths at 7,733 feet elevation. Boat access from Lake Village or Mary Bay targets these hidden wonders: vertical spires, hot vents, and bubble curtains. Summer temps hover 40 to 50 degrees F with 10 to 30 feet viz. Explore responsibly per NPS: no sampling, minimal impact via Leave No Trace. Ideal July to September for calm conditions.
Safety Considerations
Expert-level due to boat ops in wind, spire entanglement, and rapid temp changes from cold to scalding. Use high-altitude profiles per DAN: safety stops 10 to 11 feet, slow ascents. Gas planning critical for depths; currents near vents unpredictable. Low viz hides spires; lights mandatory. NPS thermal closures possible; check alerts. Pathogen risks in vents; full face seals.
Essential Gear
Drysuit, high-altitude computer, stage bottles. Primary lights, backups for spire caves. Boat kit: anchor, ladder, VHF. REI dry bags for transport.