Polar Caves Park

State: New Hampshire. Type: glacially formed talus (boulder) cave system and nature park in Rumney, Grafton County, about 5 miles west of Interstate 93 near Plymouth. Consists of nine granite boulder caves formed during the last ice age. Discovered in summer 1922 by Plymouth High School student Bernard A. Campbell; first public tour conducted in 1923. Privately owned.

Polar Caves Park centers on a set of nine granite boulder caves in Rumney, New Hampshire, formed by glacial activity at the end of the last ice age. The caves were discovered in the summer of 1922 by a local high-school student, Bernard A. Campbell, whose science teacher and a local businessman recognized the site's tourism potential; the businessman purchased the land and opened the first public tour in 1923, making this one of New Hampshire's longer-running roadside natural attractions. The caves stay naturally cool year-round, and the deepest of them can hold lingering snow well into summer, a novelty that has long been part of the park's draw. Beyond the caves themselves, the park has built out into a broader family attraction with boardwalk and stairway access through the boulder maze, a European fallow deer park, and a children's mining game. The park operates seasonally, generally from mid-spring to mid-fall, reflecting its outdoor, weather-dependent nature.

Polar Caves Park is located in Rumney, New Hampshire, in Grafton County, roughly 5 miles west of Interstate 93 near Plymouth, in the state's Lakes Region/White Mountains foothills area.

The Rumney/Plymouth area has a four-season New England climate with cold, snowy winters and warm summers; the caves themselves stay naturally cool regardless of surface weather, with the deepest cave cold enough to let snow persist into summer, per Wikipedia.

The park operates seasonally from roughly mid-May to mid-October (per Wikipedia) with reported 2026 scheduling of daily operation from mid-June through Labor Day weekend and Wednesday-Sunday operation from Labor Day weekend through mid-October, and weekend-only operation in the spring and fall shoulder periods, per search-result summaries; confirm exact 2026 dates on polarcaves.com.

The caves were discovered in the summer of 1922 by Bernard A. Campbell, a Plymouth High School student exploring with friends. His science teacher, Henry Minot, and local businessman Arthur B. Thatcher recognized the site's tourism potential; Thatcher purchased the land and developed it, and the first public tour was conducted in 1923. The park has continued operating as a seasonal nature attraction since, adding boardwalk and stairway access, a boulder maze, a European fallow deer park, and a children's mining game to the original cave-touring concept.

Visitors walk through the nine connected granite boulder caves via boardwalks and stairs, navigate the boulder maze, and visit the on-site European fallow deer park. A children's mining game (likely a gemstone/mineral sluicing activity, per the park's family-attraction framing) is also part of the grounds. Because the caves stay cool year-round, exploring them is a popular way to escape summer heat.

The nine granite boulder caves are the park's central attraction, along with the boulder maze that connects sections of the route. The European fallow deer park and the children's mining game are the other named on-site features from the sources reviewed.

The park sits about 5 miles west of Interstate 93 near Plymouth, New Hampshire, making it accessible by a short drive off the interstate for visitors traveling through the Lakes Region or White Mountains foothills; specific airport or transit information was not found in the sources reviewed.

Per search-result summaries citing the park's own scheduling, general hours run roughly 9 a.m. to 3 p.m. within a mid-May to mid-October season, with daily operation in peak summer (mid-June through Labor Day) shifting to fewer open days (reported as Wednesday-Sunday) in the fall shoulder season; confirm current hours directly at polarcaves.com or by phone, since this information came from search snippets rather than a directly fetched official page.

The most recent pricing found in search results (dated 2024) listed online prices of $24.50 for adults, $21.50 for ages 65+, and $15.50 for youth ages 4-11; these figures are not confirmed for 2026 and should be reverified at polarcaves.com or by calling (603) 536-1888 before visiting.

Most visitors spend one to two hours walking the cave system, boulder maze, deer park and mining activity at a relaxed pace.

The Plymouth, New Hampshire area, a few miles from the park, offers a mix of motels and chain hotel options typical of a college town and highway junction; sources reviewed did not name specific properties, so none are listed here.

Plymouth, close to Interstate 93, has a range of casual dining options serving travelers and Plymouth State University; sources reviewed did not detail specific restaurants near the park itself.

The park sits in New Hampshire's Lakes Region/White Mountains foothills area, within reach of Plymouth and the wider I-93 corridor; sources reviewed did not confirm other specific nearby attractions to list with confidence.

No specific airport or public-transit information for reaching Polar Caves Park was found in the sources reviewed; a personal vehicle via Interstate 93 is the standard way to reach the park.

The cave route involves boardwalks, stairs and uneven boulder terrain, so sturdy, non-slip footwear is important, and the caves themselves are notably cool even in summer, so a light layer helps. Supervise children closely around the boulder maze and cave stairways. For any emergency, dial 911.

A light jacket or sweater for the naturally cool caves (even in summer), sturdy closed-toe shoes for boardwalks and stairs, and a camera for the boulder formations and deer park are worth bringing.

Because the park's hours and open days shift by season (daily in peak summer, fewer days in spring/fall shoulder periods per search-result summaries), call ahead or check polarcaves.com before making the trip, especially outside the mid-June-to-Labor-Day peak window. Given the site's cool cave interior, dressing in layers works better than dressing solely for outdoor summer heat.

Dial 911 for any emergency. The park's general phone line, per search-listed business information, is (603) 536-1888.

Polar Caves Park - https://polarcaves.com

This section is being updated and will be available shortly.

This section is being updated and will be available shortly.

This section is being updated and will be available shortly.