Fire managers may institute fire restrictions any time that fire danger and general conditions call for them. The goal of the restrictions is to reduce the possibility of accidental human-caused fire that could threaten visitors and employees during times of high fire danger. To minimize a surprise when you get to the parks, check this information right before you travel and ask in a visitor center when you arrive.
Stage 1, Stage 2, and Stage 3 fire restrictions are implemented due to fire danger. However, additional fire restrictions are in place for Wilderness/ Backcountry travel to ensure minimum impact practices. Please visit here for more information.