Fort Fork, National historic site and trading post in Peace River, Alberta, Canada

Fort Fork is the site of a North West Company trading post on the Peace River in Alberta, established in 1792 and used until 1805. It lies southwest of the present-day town of Peace River. No structures survive; the archaeological site shows a semi-circular depression and a cairn.

The North West Company built Fort Fork on the Peace River in 1792. Alexander Mackenzie wintered there from 1 November 1792 to 9 May 1793 while preparing his expedition to the Pacific Ocean. The post stayed in use until the NWC merged with the XY Company in 1805, when Fort Dunvegan, further upstream, replaced it.

The post's name comes from its position at the fork where the Smoky River meets the Peace River. It was one of the North West Company's posts on this stretch of the Peace, and its trade in furs linked the region to the company's network until the 1805 merger with the XY Company. The site is now marked by a cairn.

The site lies southwest of the town of Peace River, Alberta, and is reached by road; no structures stand, so look for the cairn and the semi-circular depression in the ground that mark the fort's location. There are no facilities or shelter, and the open river valley is exposed to weather, so bring water and wear footwear suited to rough ground.

The exact wintering dates are recorded: Mackenzie stayed at Fort Fork from 1 November 1792 to 9 May 1793. The fort itself was abandoned after the North West Company merged with the XY Company in 1805, when Fort Dunvegan upstream took over the trade.