The Prairie Hills wildfire in Glacier National Park had expanded to 70 hectares by Aug. 30.
Parks Canada fire officials say the controlled fire is still within "predetermined boundaries set by Parks Canada."
Fire officials are taking a hands-off approach to the fire, saying letting it burn serves natural ecosystem regeneration processes. "The fire does not pose a threat to the highway and is primarily burning up dead timber from previous fires and will provide a future natural fire guard for the area," said Parks Canada spokesperson Jacolyn Daniluck in a statement. "The smoke from the fire is visible from the highway and the fire continues to be closely monitored by Parks Canada."
The fire in the Beaver Valley was started by lighting on Aug. 21.
Learn why Parks Canada is choosing to monitor and not actively fight the fire in this story.