New York State publishes what is at every one of its parks, and the honest answer for the Adirondacks is that no state park with a playground is within an hour. The nearest is Higley Flow, about 76 minutes out. Up here the free things are the trailheads and the water, not the playgrounds.
The six nearest anyway
| Park | County | Drive | What is there |
|---|---|---|---|
| Higley Flow | St. Lawrence | 76 min | Playground · Beach · Camping · Nature centre |
| Moreau Lake | Saratoga | 80 min | Playground · Beach · Camping · Nature centre |
| Macomb Reservation | Clinton | 87 min | Playground · Beach · Camping |
| Whetstone Gulf | Lewis | 88 min | Playground · Beach · Camping |
| Saratoga Spa | Saratoga | 92 min | Playground · Nature centre |
| Schoharie Crossing | Montgomery | 94 min | Playground |
One caveat, stated plainly: this data does not include fees. Some state parks charge a per-vehicle day-use fee in season and some do not, and the state does not publish that in this dataset. Every park above links to its official page, which is where the current charge is listed. Do not assume free.
Filter it yourself
Drive times are estimated from straight-line distance ×1.15 for road routing, at a speed that rises with distance from 40 mph on local roads to 65 mph on the interstate. The finder below lets you set your own limit and filter on what you actually need.
This page covers the state park data, because that is what the state publishes directly. The rest — municipal playgrounds, trailheads, library passes and free museum days — is being checked one at a time and will be added here rather than guessed at.