Cornelius Creek is a coastal waterway integrated into Black Rock Canal Park along the Niagara River in Buffalo, New York. The park, formed by combining the former Cornelius Creek area with the Ontario Street Boat Launch, provides a primary, free public boat ramp suitable for launching hand-carried craft like kayaks, canoes, and stand-up paddleboards. This launch offers direct access to the Niagara River corridor. Paddlers should be aware of a permitted sewage outflow located under the walkway bridge near the Black Rock Harbor Road entrance within the park. The water quality is monitored monthly from May to October, with results compared to EPA standards for safe recreational use. The surrounding area features a paved riverside trail popular for walking and biking, an off-leash dog park, picnic areas, and shaded spaces. The park's character is that of an active, developed urban waterfront with scenic views of the Niagara River, catering to a mix of recreation including boating and shoreline activities. Park hours are seasonal, operating from 7 am to dusk between Labor Day and Memorial Day, and extending to 9 pm from Memorial Day to Labor Day.