Three Oregon rivers meet inside a 900-foot canyon, and this lake was built right on top of them

Most Oregon lakes have exactly one river feeding them. Lake Billy Chinook has three — the Deschutes, the Crooked, and the Metolius — and all of them disappear into a canyon that had already been carved as much as 900 feet deep long before any of that water showed up.

Round Butte Dam flooded the canyon floor in 1964, and Lake Billy Chinook has been Central Oregon’s strangest, most dramatic lake ever since. You can hike above it, launch a boat onto it, or rent a houseboat and never touch land for three days straight.

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Where three rivers actually meet

The Crooked and Deschutes river canyons here run 800 to 900 feet deep, cut by water working through layers of lava that started stacking up 10 to 12 million years ago. Portland General Electric’s Round Butte Dam, built between 1961 and 1964, backed the Deschutes up far enough to drown most of that canyon floor and pull the Crooked and Metolius arms into the same reservoir.

The result is a lake with three distinct arms and roughly 72 miles of shoreline, split by a 200-acre landform locals just call “the Island.” It’s basalt cliffs on every side, which is exactly the kind of scenery that makes the drive out from Bend worth it.

The hike that puts you above it all

Tam-a-láu Trail starts in the Deschutes River Campground and climbs about 600 feet to reach the plateau above the lake — a loop that runs 6 miles round trip from there, or 7 miles if you start from the Upper Deschutes day-use area instead. AllTrails logs the full loop’s cumulative climb closer to 1,070 feet, since the rim itself rolls the whole way around instead of staying flat.

It’s rated moderate, and reviewers are consistent on one point: there’s zero shade once you’re on top, so this is a sunrise hike in July and August, not an afternoon one. What you get for the climb is a plateau ringed by views of the snow-capped Cascades on one side and both river canyons on the other.

Skip the extra mile from the Upper Deschutes trailhead if you’re already staying at the campground — you get the same loop for less walking, and there’s no version of this hike where the extra mile earns you a better view.

If you’d rather never leave the water

From April through October, the Cove Palisades Resort and Marina rents everything from kayaks to full-size houseboats that sleep up to 15 people, complete with a hot tub and water slide off the top deck — because apparently regular houseboating wasn’t already enough of a flex. A three-night stay in peak season, June 20 through early September, starts around $4,125 before tax for the smaller of their two houseboats. Not a cheap weekend, but it’s the only way to wake up inside this canyon without pitching a tent.

Day boat launches are simpler: three day-use areas — Lower Deschutes, Upper Deschutes, and Crooked River — all have ramps and swim beaches, though none of them have lifeguards. Blue-green algae blooms show up occasionally between April and September, so it’s worth a quick check of Oregon’s health advisories before anyone jumps in.

It’s about 45 minutes north of Bend, which puts it well within day-trip range if that’s your base. Pair it with a stop at Smith Rock State Park, about 30 minutes away, for a full day of Central Oregon’s strangest geology in one loop.

What it actually costs to get in

Cove Palisades charges the standard Oregon State Parks day-use fee — $10 a day for Oregon residents, $12 for everyone else, or a $60 annual pass if you’re planning more than a handful of trips this year. Camping runs through two campgrounds, Crooked River and Deschutes River, and as of this year the top nightly rate at both climbed to $29 for tents and $52 for full hookup RV sites, in effect on weekends year-round and every night from May through September.

Fire restrictions are common here in peak summer, so it’s worth checking current conditions before you load up a stove or a fire ring. None of that is a reason to skip the trip — it’s just what it costs now to camp at one of the state’s 29 busiest parks.

Would you rather earn the view from the rim trail, or skip straight to floating on top of it? Either way gets you to the same strange, three-river lake — just from opposite directions.

Trip tips: grab a rental car to get out here, lock in a hotel in Bend before summer weekends book up, or skip both and bring a camper van instead.

Rules and fees change — always confirm current requirements before you go.

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