Fort Fork site, located in the Peace River Wildland Provincial Park is a national historic site. The fort was erected in 1792 by the North West Company. Alexander Mackenzie wintered at Fort Fork in 1792 as did David Thompson in 1802. The fort was abandoned in 1805 and has since been almost completed eroded by the Peace River. A flag planted at Fort Fork's former site is all that remains. Mackenzie Cairn was erected on River Lot 19 in the Municipal District (M.D.) of Peace No. 135 in 1929 to commemorate Fort Fork.