Oregon
Lakes

Crater Lake is most often called the prettiest lake in Oregon — and it’s hard to argue. Formed 7,700 years ago when Mount Mazama collapsed into itself, it sits at 6,178 feet with water so pure and deep that it produces a shade of blue that doesn’t look real. At 1,943 feet, it’s the deepest lake in the United States and the ninth deepest in the world.

That said, “prettiest” is genuinely contested in Oregon. Waldo Lake is one of the clearest and most pristine lakes on Earth — its water appears electric blue because it contains almost no dissolved minerals. Wallowa Lake in northeast Oregon is glacier-carved beneath peaks that look imported from the Alps. Sparks Lake near Bend frames South Sister and Broken Top in early-morning stillness that stops photographers in their tracks. Oregon simply has too many stunning lakes for any one to win outright.

Oregon has more than 130 named lakes and reservoirs spanning every region of the state. The most significant include:

• Upper Klamath Lake — Oregon’s largest lake by surface area, covering roughly 64,000 acres near the California border
• Crater Lake — the deepest lake in the US at 1,943 feet, and the second deepest in the Western Hemisphere
• Lake Owyhee — Oregon’s longest lake at 52 miles, a remote reservoir in the state’s southeast corner
• Malheur Lake — a vast shallow lake in Harney County, critical habitat within the Malheur National Wildlife Refuge
• Waldo Lake — one of the largest natural lakes in the Cascades and among the purest bodies of water in the world
• Detroit Lake — the most-visited reservoir in Oregon, impounding the Santiam River in the western Cascades
• Lake Billy Chinook — where three rivers meet behind Round Butte Dam, creating dramatic canyon scenery in central Oregon
• Wallowa Lake — the iconic glacier lake of northeast Oregon, flanked by Eagle Cap Wilderness peaks

Yes — and there are actually more than two. Oregon has at least ten lakes named Clear Lake scattered across the state. The two most well-known are quite different from each other:

The most famous is Clear Lake near Sisters in the Deschutes National Forest, a spring-fed pool of extraordinary transparency. The water is so clear that lava-killed trees from a 3,000-year-old eruption are visible standing upright on the lake bottom, up to 40 feet below the surface. No motors are allowed, and the water temperature stays near freezing year-round.

The second commonly visited Clear Lake is near Timothy Lake on the south side of Mount Hood — a seasonal winter rental lookout sits on Clear Lake Butte above it, and the lake itself offers good trout fishing. When searching for a specific Clear Lake in Oregon, always confirm the county or region to make sure you’re headed to the right one.

You actually can swim in Crater Lake — but only at one location, and only when the park’s access trail is open. The sole permitted swimming and water-access point is Cleetwood Cove, reached by a steep 1.1-mile trail (with 700 feet of elevation change) on the north rim. The trail typically opens in late June or July once snow clears, and closes by mid-October.

Swimming is not allowed anywhere else along the caldera rim because the vertical walls drop hundreds of feet straight into the water, making entry and exit from any other point impossible and extremely dangerous. The water temperature at the surface ranges from about 55–60°F in summer — cold, but swimmable. The lake’s extraordinary purity means no sunscreen or soap is permitted in the water.

If you’ve heard that swimming is banned entirely, that may stem from temporary closures due to algae blooms or trail conditions that have occurred in recent years. Always check the Crater Lake National Park website for current access status before your visit.

Trillium Lake, located just a few miles south of Government Camp near Mount Hood, is widely considered Oregon’s most photographed lake. The view from its eastern shore — Mount Hood’s 11,249-foot volcanic cone perfectly mirrored in the still water at dawn — has appeared in countless magazines, travel guides, and photography collections. A paved accessible loop trail circles the lake, making it reachable by nearly everyone, which has only added to its iconic status.

Crater Lake is a strong contender for the title as well, particularly the view from Rim Drive looking across the caldera to Wizard Island. But for a single postcard image that captures Oregon’s landscape in one frame, Trillium Lake’s Mt. Hood reflection is the one that appears most consistently in print and online.

The most well-known “secret beach” in Oregon is Secret Beach (officially part of Samuel H. Boardman State Scenic Corridor) near Brookings in the far south coast. It’s reached by a short but steep trail through old-growth forest that drops down to a sheltered cove framed by sea stacks and tide pools. The trail is unmarked on many maps, which has kept it quieter than Oregon’s more famous beaches. Look for the trailhead near milepost 338.5 on US-101.

Oregon’s 362-mile coast is entirely public land — every beach is legally accessible to the public under the Oregon Beach Bill of 1967. This means many genuinely secluded beaches exist up and down the coast that simply require more effort to reach. Other hidden coastal gems include Whaleshead Beach and China Beach in Boardman, Coquille Point near Bandon, and numerous coves accessible only at low tide between Cape Perpetua and Florence. The reward for the extra hiking is almost always solitude and dramatic scenery.