Complex sentence: The Bloodvein River became Manitoba's first Canadian Heritage River in 1987 and most of the river is within Atikaki Provincial Park and the Woodland Caribou Provincial Park in Ontario.
Split into simpler sentences: The Bloodvein River became Manitoba's first Canadian Heritage River in 1987. For most of its length, the river is within Atikaki Provincial Park in Manitoba and the Woodland Caribou Provincial Park in Ontario.