[3] The Historic site is a cultural landscape 404 square kilometres (156 sq mi) forested upland plain between the South Shore and the Annapolis Valley.

The name Kejimkujik is officially translated to "tired muscles" in the Mi'kmaq language, although other sources interpret it to mean "swollen waters" or "attempting to escape".

[6] Canoe routes in the park have been used for thousands of years by native peoples to travel from the Bay of Fundy to the Atlantic shore.

The Tent Dwellers is a book by Albert Paine[9] which chronicles his travels through inland Nova Scotia on a trout fishing trip.

Ultimately, many of these residents either took up farming or found employment as guides for wealthy visitors to the area through hunting and fishing expeditions.

[6] The main Jeremy's Bay campground has 355 campsites, many suitable for large RVs, and generates about $1 million per year in fees.

[10] A group campground for up to 80 people is at Jim Charles Point, named after the eponymous local First Nations Guide who lived there in the mid-1800s.

From Peskawa Lake, it is possible to reach the Shelburne River and enter the Tobeatic Wilderness Area, located just outside the park.

Wildflowers bloom from May through June and common species include blue violet, star-flower, rose twisted-stalk, twin-flower, painted trillium, and goldthread.

[16] Among the 34 species of mammal found in the park, the more common are: shrews, the star-nosed mole, bats, snowshoe hare, squirrels (including nocturnal flying squirrels), beaver (protected species in Nova Scotia), mice, voles, porcupine, red fox, and white-tailed deer.

[17] The park's shallow lakes, bogs, and marshes are a habitat to a greater variety of amphibians and reptiles than anywhere else in Atlantic Canada.

[20] The park is habitat to many endangered or threatened species, including the Blanding's turtle, ribbon snake, piping plover, Canada warbler, common nighthawk, chimney swift, monarch butterfly, and harlequin duck.

Yellow perch, 10–15 cm (3.9–5.9 in) long, is their main source of food, and these have been found to have more than twice the mercury level than loons from neighbouring New Brunswick.

[24] The federal government Kejimkujik Ecological Research and Monitoring Centre has run dozens of projects in the park.

Kejimujik National Park Seaside includes white sandy beaches and coastal wetland areas.

Temperatures in the park rarely exceed 30.0 °C (86.0 °F), occurring on 5.9 days per year owing to the moderating influence of the ocean.