A fire of suspicious origins that grew to nearly 50 acres has been fully contained in Grand Teton National Park, officials said Sunday.

While investigators continued to search Sunday for the cause of the Cathedral Group Fire, fire crews continued to reinforce fire lines around the 46-acre fire's perimeter and douse any hot spots within the lines, park officials said in a release.

During the firefighting effort crews laid 13,500 feet of hose during their efforts to suppress the fire, which was burning in a boulder field that made digging traditional
fireline to mineral soil next to impossible, fire bosses said.

While the fire is contained, park officials said the Cathedral Group turnout and the Boulder City off-trail area remain closed for the immediate future.

The fire is presumed to be human caused and is still under investigation. Anyone who may have been in the vicinity of the Boulder City area last Tuesday evening—and can provide information about this fire—is requested to phone the Teton interagency fire-reporting line at 307-739-3630.