4 /5 Hex Kleinmartin: This is a cool little park, kind of tucked away in-between the 190 and the Niagara River. Theres only one entrance through the underpass under the 190, but the park spreads to either side of the entrance. Most of the parking is to the north, but there is a small amount of parking right at the entrance, near the boat launch. The boat launch is free, and the area of the river means that the current there along the shore is actually flowing upstream, making it a little easier to control a boat at this point.
There is a two part dog park just over the walking bridge to the south (no parking nearby other than the lot by the boat launch), and theres a displayed piece of the actual rock formation that gave Black Rock its name (although the actual rock was all the way on the other side of the Peace Bridge, and its really a dark grey and not black, but go with it).
All the way to the north, where there is a really tight circle for small cars to turn around at the end of the parking area, is the Avian Walk with some wireframe sculptures of birds one might see in the area.
One thing to note is that the Shoreline Trail bike path goes right through this and through the parking lot without defined lanes. This means that both drivers and cyclists need to be on the lookout for each other, going in either direction or pulling into or out of parking spaces.