• Photo of the Beaver Marsh by Jeffrey Gibson.

    Cuyahoga Valley

    National Park Ohio

There are park alerts in effect.
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  • Towpath Trail Closure

    Towpath Trail is closed from Mustill Store to Memorial Parkway for riverbank reinforcement. Detours posted. Closure will last 1 - 4 weeks into August. More »

  • Other Closures

    Valley Bridle Trail south of SR 303, across from golf course, is collapsed by river. Hard closure. Plateau Trail Bridge, north of Valley Picnic Area is closed. No detours. Plateau & Oak Hill trails are open. More »

  • Riverview Road Repaving

    Riverview Rd is being repaved from the Cuyahoga-Summit Cty line to Peninsula through Mon, 9/15. Road is open but there are still delays due to construction. Allow extra time. More »

Nonnative Species

With its long history of disturbance, Cuyahoga Valley National Park contains a number of nonnative species.

Plants
A 1986 study found 186 nonnative plant species in CVNP, nearly 20 percent of the park’s 943 plant species. Ten species of nonnative plants are currently considered threats to the park’s natural ecosystems and native flora. These species have the potential to form large stands that crowd out native plants and provide only limited habitat value for wildlife. Purple loosestrife, garlic mustard, honeysuckle, Russian and autumn olive, reed canary grass, giant reed grass, Japanese knotweed, Japanese multiflora rose, narrow-leaved cat-tail, and European alder buckthorn can become so permanently established that their populations are extremely difficult to eradicate. Resources management staff uses a variety of control and management techniques to keep nonnative invasive plant species at levels that do not threaten natural conditions. Natural areas of the park are monitored periodically to ensure the efficacy of control measures.
Learn more about non-native plants.
Volunteer to help control these plants.

Insects
The nonnative insect of great concern is the gypsy moth. An exotic insect species from Europe, gypsy moths defoliated over 4,000 acres of forest in CVNP in 1999. Defoliation directly affects trees by decreasing their health and vigor, which can result in an increased susceptibility to disease and parasites and increased tree mortality. Defoliation and the loss of mature trees can change forest and understory composition, water quality in streams and lakes, and quality and availability of food for terrestrial and aquatic wildlife. These changes can alter the abundance and distribution of wildlife. The park has implemented a suppression program to help minimize and mitigate further moth defoliation effects.
Learn more about the gypsy moth.

The new pest is the emerald ash borer, an Asian wood-boring beetle that kills ash trees three to five years after infestation. Adults are dark metallic green, and fly from May through September to ash trees to mate and lay eggs. Larvae emerge and tunnel beneath the bark, chewing on vascular tissue and interrupting the tree’s circulatory system. An infestation only becomes apparent once the canopy thins, branches die back, and death begins. By then, the insect has long since moved on. The emerald ash borer has already killed millions of ash trees from Illinois to Maryland and up into Ontario. It is in at least 26 Ohio counties, including those in and near CVNP. The Ohio Department of Agriculture prohibits the transportation of ash tree materials and all non-coniferous firewood out of quarantined areas.
Learn more about the emerald ash borer.

These and other nonnative species in CVNP are evaluated and monitored by resources management staff. As directed by the park’s general management plan, exotic plant and animal species are controlled or eradicated when possible.

Did You Know?

Photo of Bald Eagle taken in Cuyahoga Valley National Park where an eagle pair built their first nest in 2006. Photo by Martin Trimmer.

November is the time to be on the lookout for bald eagles performing aerial courtship displays. Once eagles have selected each other, they plunge through the air in very high dives, locking their talons and breaking apart just when it looks as though they will crash to the ground.