A River Gorge With Swimming Holes and Gold
Coos Canyon is not a traditional waterfall. It is something better: a 500-yard stretch of the Swift River in Byron where the water has carved through bedrock over thousands of years, creating a narrow gorge with sculpted rock walls, deep pools, cascading chutes, and potholes worn smooth by the current. The gorge walls rise about 32 feet, and the rock is layered and folded, striated with bands of color. The river weaves through it in a series of drops and swirls that range from gentle slides to churning cascades, with a 15-foot waterfall as the largest single drop.
What makes Coos Canyon unique in Maine is the combination of geology, accessibility, and recreation. The gorge sits right along Route 17, with parking on both sides of the road. You can see it from your car. But step down to the water and the place transforms into a natural playground: deep pools for swimming, smooth rock ledges for lounging, and quiet eddies where you can sit chest-deep in cold mountain water on a hot July afternoon.
And there is gold. Real gold. The Swift River is one of the best-known recreational gold panning spots in New England.
The Swift River runs fast through Coos Canyon, especially in spring and after rain. Some pools are deceptively deep. The rock is slippery when wet. Jumping from rock ledges carries real risk, as underwater ledges and variable depth make every pool different. Supervise children closely. People have been injured here.
The Gorge
The gorge stretches along Route 17 for roughly 500 yards. On both sides of the road bridge, the riverbed is exposed bedrock carved into fantastic shapes. Upstream of the bridge, broad slabs of rock slope into the water, and a series of pools and chutes create natural swimming areas. Downstream, the gorge narrows and the water picks up speed, cutting through tighter rock walls.
The rock itself is worth studying. Layers of metamorphic stone are folded and twisted, with veins of quartz running through darker schist. Potholes drilled by centuries of swirling current dot the ledges, some holding small pools of still water separate from the river. Rock crystals and interesting hydraulic erosion features are visible throughout the canyon. The whole place looks like a geology textbook come to life.
No hiking is required. You walk from the parking area down a short, worn path to the river edge. The path is about 200 yards at most. From there, you can explore up and down the gorge on the exposed bedrock, hopping between pools and ledges. A roomy daypack is handy for hauling your towel, panning kit, and snacks down to the rocks for the afternoon.
The rock in the gorge is smooth but slippery, especially where it is wet. Water shoes or sport sandals with good grip make exploring the ledges much safer and more comfortable. Bare feet work on the dry rock but get dicey near the water.
Swimming
The swimming at Coos Canyon is some of the best roadside swimming in Maine. Several pools are deep enough for full immersion, with the water ranging from waist-deep wading areas to pools that are 8 to 10 feet deep. The water is cold, fed by mountain streams, but on a hot summer day it is refreshing rather than punishing.
Local kids jump from several spots along the gorge. The rock ledges range from a few feet above the water to higher drops that are genuinely risky. If you choose to jump, check the depth of each pool carefully. Water levels and pool depths change with the season and recent rainfall. What was safe last week may not be safe today.
The swimming is best from late June through August. By September the water is too cold for most people, and spring flows are too fast and dangerous for swimming.
Gold Panning
The Swift River carries fine gold, deposited by glacial action and eroded from quartz veins in the surrounding hills. Recreational gold panning is legal in the river, and Coos Canyon is the most popular spot to try it. You will not get rich. The flakes are tiny and the quantities are measured in fractions of a gram. But the thrill of seeing actual gold glinting in your pan is real, and kids especially love it.
The Coos Canyon Rock and Gift Shop, located at 472 Swift River Road, has been a family operation since the 1950s. They rent and sell panning supplies, offer free prospecting and panning lessons, and carry locally made jewelry from Swift River gold. The shop is open seasonally from May through mid-October. You can also bring your own panning equipment.
The technique is simple: scoop gravel from crevices in the bedrock (gold settles into cracks), swirl it in a pan with water, and slowly wash away the lighter material. The gold, being heavier, stays at the bottom of the pan.
The best gold panning spots are in the crevices and cracks of the exposed bedrock, not in the sand. Gold is heavy and settles into the deepest points in the rock. Use a small screwdriver or spoon to dig gravel out of narrow crevices along the river edge, then pan that material. You are more likely to find color this way than by scooping random handfuls of river sand.
When to Go
Spring
High water makes the gorge dramatic but swimming is dangerous. Good for photography, not for wading.
Summer
Warm enough for swimming. Water levels drop to safe, enjoyable levels. Busy weekends. Gold panning is best at lower water.
Fall
Foliage along Route 17 is spectacular. Water is too cold for swimming but the gorge is beautiful.
Winter
The gorge partially freezes and the ice formations are striking. Not a swimming destination. Road is plowed.
July and August are the prime months for the full Coos Canyon experience: swimming, gold panning, and warm-rock lounging. Weekdays are dramatically less crowded than weekends. Fall brings outstanding foliage along the Route 17 scenic drive, which is one of the best leaf-peeping roads in Maine even without the gorge.
Practical Notes
The parking lot is on both sides of Route 17 at the bridge over the gorge. There is room for 15 to 20 cars in the main lot, and an overflow lot just up the road toward Rangeley. On hot summer weekends the parking fills early. Arrive early on busy days.
Picnic tables sit on the riverbank, and public restrooms are available near the parking area. Rumford is the nearest town with full services, including gas, groceries, and restaurants. The Rangeley Lakes region is about 30 minutes north on Route 17, and Smalls Falls is along the way.
Packing List
Coos Canyon Visit
- Swimsuit and towel
- Water shoes or sport sandals
- Gold panning kit (optional, rent or buy at Coos Canyon Rock and Gift Shop)
- Sunscreen (the rock reflects heat)
- Water and snacks
- Camera
- Small screwdriver for crevice panning (if gold panning)
Getting There
Coos Canyon is on Route 17 in Byron, approximately 6.8 miles north of the junction of Route 17 and US Highway 2 in the town of Mexico. From Portland, the drive takes roughly 2 hours and 15 minutes via Route 2 through Farmington, or Route 26 through Bethel. From Bangor, expect about 2 hours and 45 minutes.
Route 17 between Rumford and Rangeley is designated the Rangeley Lakes National Scenic Byway. Coos Canyon is about a third of the way from the south end.
GPS coordinates: 44.7208, -70.6322
FAQ
Is Coos Canyon a waterfall?
Not in the traditional sense. It is a river gorge where the Swift River has carved through bedrock, creating cascades, chutes, pools, and sculpted rock formations. The largest single drop is about 15 feet. The gorge walls rise roughly 32 feet.
Can you really find gold at Coos Canyon?
Yes. The Swift River carries fine glacial gold. Recreational panning is legal and you can find small flakes and specks of real gold in the bedrock crevices. You will not strike it rich, but finding a flake of gold in your pan is genuinely exciting. The Coos Canyon Rock and Gift Shop rents panning supplies and offers free lessons.
Is the swimming safe?
The swimming is generally safe in summer at normal water levels, but the river has swift current, slippery rock, and pools of variable depth. Check depth before jumping. Supervise children. Do not swim during high water or spring runoff.
Is there a fee?
No. Coos Canyon is a natural site along a public road with no fees or permits required. The Coos Canyon Rock and Gift Shop is a private business that charges for panning supplies and lessons.
How does Coos Canyon compare to Smalls Falls?
Smalls Falls is a more traditional waterfall with a developed rest area. Coos Canyon is a river gorge with swimming holes and gold panning. Both are on Route 17 about 30 minutes apart and pair well for a full day in the western mountains.
