The backbone of southwest Ohio's water trail system — 170 miles of paddling and smallmouth bass fishing, even river surfing in downtown Dayton, anchored by one of the largest fountains in the world.
The Great Miami River starts upstream of Indian Lake and runs 170 miles southwest to its confluence with the Ohio River west of Cincinnati. Six major tributaries feed it — the Stillwater River, Mad River, Twin Creek, Buck Creek, and Greenville Creek — along with more than 6,600 miles of smaller streams draining 15 counties across southwest Ohio.
It's the central artery of the Great Miami River Watershed Water Trail, Ohio's only National Water Trail, and it anchors the Great Miami Riverway, the regional program connecting paved trails and downtown communities along its banks.
The river's name traces back to the Myaamia word for "downstream person" or "downstream people." French settlers in the 1800s called it "La Riviere a la Roche" — Rocky River — and the Myaamia people still call it the Ahsenisiipi, or Rocky River, for its stony bottom during the dry summer months.
The Great Miami supports kayaking, canoeing, rowing, and even river surfing, with public access points stretching from Sidney to Hamilton. Rowing in particular has a strong following in Dayton, Miamisburg, and Hamilton.
At the river's confluence with the Mad River, RiverScape MetroPark's Five Rivers Fountain of Lights ranks among the largest fountains in the world: six fountains drawing from seven groundwater wells, shooting up to 2,500 gallons of water a minute, with a central geyser that climbs 200 feet into the air across an 800-foot-diameter pool. It's worth planning a stop here even if you're not getting in the water.
Link: View the interactive water trail map and access points →
Smallmouth bass are the signature catch on the Great Miami — known for hard, sudden strikes and acrobatic fights, and capable of reaching 20 inches and 6 pounds here. Channel catfish, saugeye, and black crappie round out the fishery. Several stretches of the river meet the Ohio EPA's "exceptional warm-water habitat" standard, reserved for streams that support unusually rich and diverse aquatic communities.
A pair of bald eagles, Orv and Willa, has nested near Carillon Historical Park since 2018. In 2023 they raised three eaglets at once — something that happens only about one time in five — and photographers gather near the park most days to watch them. Beyond the eagles, the river corridor hosts belted kingfishers, great blue herons, osprey, woodpeckers, sandpipers, and Ohio's familiar red cardinal.
Below the surface, the river supports more than 1,200 species of aquatic insects, along with freshwater mussels that are now legally protected after serious historical declines. Turtles, snakes, and frogs are common sights from a canoe or kayak.
The Great Miami River Recreation Trail runs 102 uninterrupted paved miles alongside the river, a designated National Recreation Trail that's twice been named Ohio's favorite trail by Ohio Magazine. It passes through parks, forests, farmland, and riverfront cities along the way.
Note: parts of the trail cross Miami Conservancy District flood storage basins and levees, so some sections flood temporarily during high water — that's the flood protection system working as designed, not a problem. Check trail conditions before you ride.
Link: View real-time bike trail conditions → https://www.mcdwater.org/river-safety
Link: Read the full safe paddling & river recreation guidelines →
Q: How long is the Great Miami River? A: It's 170 miles long, running from upstream of Indian Lake to its confluence with the Ohio River west of Cincinnati.
Q: Is the Great Miami River good for fishing? A: Yes. Smallmouth bass are the headline catch, reaching up to 20 inches and 6 pounds, alongside channel catfish, saugeye, and black crappie. Several stretches meet Ohio EPA's exceptional warm-water habitat standard.
Q: Can you see bald eagles on the Great Miami River? A: Yes. A nesting pair, Orv and Willa, has lived near Carillon Historical Park since 2018 and raised three eaglets together in 2023.
Q: Is the Great Miami River part of a National Water Trail? A: Yes. It's the central river in the Great Miami River Watershed Water Trail, designated a National Water Trail by the U.S. Department of the Interior in 2016 — the only one in Ohio.
Q: What is the Five Rivers Fountain of Lights? A: One of the largest fountains in the world, located in RiverScape MetroPark at the confluence of the Great Miami and Mad rivers. It draws from seven groundwater wells and sends a central geyser up to 200 feet into the air.
Q: Where does the name "Miami" come from? A: It comes from the Myaamia word for "downstream person" or "downstream people." French settlers called the river "La Riviere a la Roche" (Rocky River), and the Myaamia people still call it the Ahsenisiipi for its rocky bottom.
Recreational Trails
Along the rivers, you can pedal for miles on the nation's largest paved trail network (340 miles). As you bike along the Great Miami River in downtown Dayton, just across from RiverScape MetroPark you can‚ don't miss the 1,000-foot-long mural featuring a variety of river activities.
Great Miami Riverway
Every great outdoor adventure needs some equally great places to eat, relax, and be inspired. With trails and rivers passing through the center of numerous great cities, visitors can easily cross back and forth between recreational and cultural attractions. Find your way with the Great Miami Riverway.
