Right down the street from us, the only old growth forest remaining in the CRUST (Capital Region of…read moreUpSTate New York), Lisha Kill is a semi-public park owned and maintained by the Nature Conservancy and open to the public ten months a year. (It's generally closed in February and March to avoid trail damage).
It's a great day hike that can last just an hour or a whole afternoon, dog- and relatively kid-friendly. I avoided reviewing it, I have to confess, to keep it obscure, but now some other Yelper has listed it, I'll have to chime in.
NO MOUNTAIN BIKING, no horses, OK? Snowshoeing is OK in winter months when it's open, x-country skiing not a good idea.
There are few stands of old growth forest in New York outside of the Adirondacks. This area was originally slated for a connector highway in the 1950's, which would have crossed the Mohawk at Vischer Ferry, but early local conservationists rallied and prevented the project (of dubious usefulness) from coming to fruition. Some of the Eastern white pines and hemlocks in the preserve are over 200 years old; as the name 'old growth' implies, the area of the preserve has never been developed, despite being enveloped by intensive farm, and later suburban, development.
The parking is behind the former Niskayuna Grange, previously the Niskayuna/Rosendale school until the early 20th century. This building is owned by the town of Niskayuna, and would be a great little visitor center for the preserve, only there's no money to do it. We're working on it. The building has some interest though as a surviving early school structure. Also note, as you pull in, the garage to your left (privately owned); this is the original Fire House for Fire District Number 3!
There are two main loops and one small one, all well-marked. There's a steep downhill at the beginning (which, you got it, is an uphill at the end) that can be treacherous during wet weather. The first left you take is a gradual trail on a plateau, which you can use to dart down to the Lisha Kill (creek) at the end, or make a full loop back on the creek-level trail. Go to Nature.org and look for Lisha Kill to find a trail map. There is also an audio interactive feature available for your smart phone via QR codes at little mini kiosks through the trails, for a self-guided tour of the natural history of the park.
The creek runs nicely most of the year, and is at the wading level, although it's pretty rocky for most of its run. Dogs will love this park (please be responsible, etc.), particularly your water-loving hounds.
If you care to hike further afield, by crossing Rosendale Rd. at the far end of the Lisha Kill trail system, you can connect up to the "Mohawk State Park" (Niskayuna Town Trails) trail system that leads along the Mohawk river and Lock 7. Or, you can cross over and walk up to Iroquois Middle School, and walk through woods on the other side of the playfields to River Rd. Park, and connect up to the Mohawk State Park trails system on the other side of River Rd. Altogether the parks here form a sort of secret greenspace of over 1000 acres, interrupted only by the houses along Rosendale Rd.
If you smoke, or leave litter, in this park I will personally come and find you and rip your soul from your sorry meatbag corpse. Is that clear?