Its name comes from the Bifröst in Norse mythology, which is the rainbow bridge connecting Asgard and Midgard (Earth).

[4] Thirty years later, on December 1, 1907, the Rural Municipality of Bifrost was incorporated out of the northern part of the RM of Gimli.

[4] Bifrost took its name from Norse mythology, where Bifröst is the rainbow bridge that connects Midgard (Earth) and Asgard, the home of the gods.

The independently governed Town of Arborg and the former Village of Riverton were within the boundaries of the RM of Bifrost.

The RM also contained part of Manitoba's Moose Creek Provincial Forest.