Hamilton Falls!
Hi,
One of my favorite any seaon hikes is that area. Hamilton Falls in Jamaica State Park. Follow Rte 100 south into Jamaica and once in the town watch for signs turning left to Jamaica State Park. You'll have to park outside the gate and walk in on a little road to get to the trail. It's a round trip of about 5 miles, The first and last 1.5 miles being completely flat as it follows the West River. Tons of cool rock/ice/water formations. Really pretty any time of year. Then the trail to Hamilton Falls splits off to the right and goes uphill for about 1 mile. All the way up views off the left of the trail look down into a cool ravine. Close to the top, the trail will cut off to the left which goes to the bottom of the falls. It's beautiful! Icy this time of year so caution is required, but no special gear usually. You can either bushwack on the people herd paths up the right side of the falls to the top, that's really great if you like climbing and heights, or you can get back to the main trail and continue all the way to the top of the hill almost to the road then turn left into the woods and see the falls from the top. It's a fun hike! Highly recommended!
Lowell Lake State Park is also really great. It's on Rte 11 about 10 miles east of Londonderry. Great meandering trails. Easy going.
My husband would second the recommendation of Lye Brook Falls, he did that hike on his own and really liked it. I haven't been yet.
Have fun!