Crater Lake Scuba Diving: What Is Allowed, How Cold It Is and How to Get In
Scuba diving and snorkeling are not allowed anywhere in Crater Lake, and that has not changed for 2026. Swimming is allowed, but only within 100 yards of Cleetwood Cove and within 100 yards of Wizard Island, and you have to stay 50 feet clear of any boat, dock or buoy. The water averages about 57 degrees Fahrenheit in summer. The only way down to the shoreline is the Cleetwood Cove Trail, a 1.1 mile hike that drops 700 feet, with the climb back up the hard part. Our Crater Lake itinerary covers the rim drive and the trail in full.
Is Diving Allowed in Crater Lake?
No. The National Park Service prohibits scuba gear, snorkeling gear, wet suits, masks, goggles and fins from entering the water anywhere in Crater Lake. This is not a permit you can apply for and it is not limited to certain seasons or certain access points. The rule exists to protect the lake's clarity, which is part of what makes it Crater Lake, and to keep invasive species from hitching a ride in on gear that has been in other lakes or rivers. If you search "crater lake diving" expecting a permit process like you would find at some reservoirs, there is not one. The answer is simply no, for anyone, year round.
Where You Can Swim Instead
Swimming itself is allowed, and it is one of the stranger things you can do in a national park: jump into a lake that formed inside a collapsed volcano. Two spots are open to swimmers.
- Cleetwood Cove. The bottom of the only trail into the caldera. Swimming is allowed within 100 yards of the cove, and this is where nearly everyone who swims in Crater Lake does it.
- Wizard Island. Reached by the tour boat, not by trail. Swimming is allowed within 100 yards of the island's shore for passengers who get off there.
In both spots you need to stay at least 50 feet away from any boat, boat dock or buoy, and only bathing suits and basic clothing are allowed in the water, no wetsuits or dive gear. Bring warm, dry clothes to change into right after, because the air at the rim is cool even in July and August.
How Cold Is Crater Lake?
Cold enough to notice immediately. The lake averages around 57 degrees Fahrenheit at the surface during summer, which is the only season most people are swimming at all. That is cold water lake territory, not warm lake territory: expect the shock of the first few seconds, faster breathing, and a real need to get moving or get out if you are not used to cold water. Crater Lake is also the deepest lake in the United States at over 1,900 feet, and the deep water stays cold year round regardless of the surface temperature in any given week. None of that changes the diving rule. Cold water is a safety reason to be careful about swimming, but it is not why diving is banned, the ban applies even to a wetsuit-clad diver who would not feel the cold at all.
Getting to the Water: Cleetwood Cove Trail
Cleetwood Cove Trail is the only route from the rim down to the lakeshore, and the only place most visitors legally touch the water. It is 1.1 miles one way and drops 700 feet of elevation, switchbacking down volcanic rock with little shade. The trail is at its best from mid to late summer, since it holds snow and ice into early summer some years, and it closes for the winter. Going down is easy. Coming back up 700 feet at 6,000-plus feet of elevation is the part people underestimate, budget real time and water for the climb out. The trailhead is also where the boat tours to Wizard Island depart, so it does double duty as the dock.
Plan a Crater Lake Trip
Tell us your dates and we will build the rim drive, the trail and the boat tour into one plan, timed so you are not fighting the trailhead parking lot at noon. Planning is free.
Keep planning with Crater Lake Boat Tour and Wizard Island and Best Time to Visit Crater Lake.
Crater Lake Scuba Diving: What Is Allowed, How Cold It Is and How to Get In FAQs
No. Scuba and snorkeling gear, including wet suits, masks, goggles and fins, are prohibited from entering the water anywhere in Crater Lake, with no permit or exception process.
The surface averages about 57 degrees Fahrenheit in summer. It is a cold-water lake even in August, and the deep water, which reaches over 1,900 feet, stays cold year round.
Only within 100 yards of Cleetwood Cove or within 100 yards of Wizard Island, and at least 50 feet from any boat, dock or buoy. These are the only two legal swimming areas in the park.
The park bans dive and snorkel gear to protect the lake's exceptional water clarity and to prevent invasive species from being introduced on equipment used in other bodies of water.
Cleetwood Cove Trail is the only legal access to the shoreline, a 1.1 mile hike that drops 700 feet. The climb back up is steeper work than the way down.
The only boats on the lake are the National Park Service tour boats to Wizard Island and around the rim, departing from Cleetwood Cove. Private boats are not permitted.
Yes. The worked day-by-day plan is Crater Lake Rim Trail: A 2-Day Hiking Itinerary (2 Days), with the permits, the stays and the drive times already sorted. Tell us your dates and we will put it together for you and confirm what is genuinely open on those days. Asking is free: no card, no deposit, and nothing is held until you say yes.
