Interesting time of year and weather conditions to have a fire. It looks like a fire deliberately set to improve the forage for deer. If fire, as a natural part of the life cycle of a forest, is excluded, then the shrubs get too tall for the deer to eat, and the ground vegetation changes from sun loving plants to shade tolerant species.
Wether natural, or deliberately set by the rangers, this fire will be an improvement to the park. Watch it green up in the spring ad see if the large trees survived.