Are there good parks in Beacon?

There are some nice ones, yes. In the southern part of town (and running into Fishkill), one park is Mount Beacon Park, where interested folks can hike to the top of Mount Beacon and get a great view of the Hudson Valley.

Another good park in Beacon is Beacon Memorial Park, which has baseball fields, tennis courts, and a football field, amongst other things.

Finally, there's Waterfront Park. It's not very big, but there are basketball courts and it's exactly where the name suggests it is -- right on the Hudson. There's a walkway for visitors to travel around the park's perimeter and see the river.