According to the United States Census Bureau, the town has a total area of , of which is land and , or 0.83%, is water. The geography of Warwick is dominated by Mount Grace. This mountain is located in the center of town and has a network of hiking and cross-country ski trails. Most of the mountain is owned by the state (as part of Mount Grace State Forest) and open to the public. The Metacomet-Monadnock Trail passes over the 1617 foot (493m) summit. Approximately a third of the town's land is protected as part of the Warwick State Forest thereby offering a variety of outdoor activities for the public. There are several ponds, some created by dammed brooks in Warwick, including Moores Pond, Sheomet Lake, Laurel Lake, Wheeler Reservoir, Richards Reservoir, Hastings Pond and Stevens Swamp, a mosaic of wetlands. A small wildlife management area is also located within town. The Mount Grace Land Conservation Trust, which was founded by Warwick resident Keith Ross in 1986, pays homage to the mountain by dint of its name, though its land protection activities take place in 23 municipalities.