Catskill Park and Forest Preserve
The Preserve is 287,500 acres of state land within the Catskill Park. “These public lands are primarily forested, but also include meadows, lakes, rivers, wetlands, waterfalls, cliffs, and many species of fish, wildlife, and plant life.”
Here are the websites for Catskill Preserve and for Catskill Park Interpretive Center. Phone for the Catskill Interpretive Center 845-688-3369 Map and Guide
Catskill Hikes The guide suggests you “Call DEC’s Regional Access Coordinators or the Universal Access Program in Albany at 518-402-9428 for trip-planning information.”
Here is the “Catskill Adventure”, a list of 18 suggested hikes for families. A few of these are short with small elevation gains of 300′ or less and might be suitable for you.
#13, Alder Lake 1 mile is described as “gentle, mostly level, old road/trail around the lake. ”
Lower Birch Creek Rd. has a wheelchair-accessible path around a pond