About The Caves Fifty thousand years ago, a continental glacier moved southward over New Hampshire covering mountains and valleys. As the ice sheet thawed, great blocks of granite cracked and loosened from Hawk's Cliff. These massive granite blocks fell at the base of the cliff forming Polar Caves, an amazing series of caves and passages through which you can walk. Hours of Operation Polar Caves Park is open from early May until late October (Weather permitting). Tickets are sold daily (seven days a week) from 9am until 5pm. We are open Rain or Shine but NOT if it snows. Clothing Recommendations Flat soled walking shoes should be worn. Baby strollers will NOT fit through the caves but may be used elsewhere throughout the park. You need no special clothing for the caves. Dress appropriately for prevailing conditions. Bring your camera and plenty of film. Pets and alcoholic beverages are NOT permitted or allowed. Shirts and shoes are required. Please, no running in the park. Parents, please stay with your children at all times. 12 years old or younger must be accompanied by an adult at the Cave Tour. Please take nothing and leave only footprints. The Cave Tour is somewhat strenuous and should be attempted by only those in good health.