Authorities found Treat’s body at the scene, but not the bear. Wildlife and law-enforcement officials were searching for the grizzly Wednesday evening.
Treat was a law-enforcement officer with the U.S. Forest Service.
Treat grew up in nearby Kalispell, where was a standout distance runner in high school, his former coach, Paul Jorgenson, told the Flathead Beacon newspaper.
“He was a really good runner but he was also a kind-hearted person who cared about people,” Jorgenson told the Beacon.
The second rider, who was not identified, was not injured. Authorities have closed the area, which is about 3 miles away from Glacier’s west entrance, for public safety.
Grizzlies in the Lower 48 states have been designated a threatened species since the 1970s, but their numbers are increasing and so are conflicts between humans and bears.
The grizzlies in the Glacier area among about 1,000 bears in the Northern Continental Divide Ecosystem, which also includes the Bob Marshall Wilderness south of the park. At least 700 more grizzlies live in and around Yellowstone National Park, which is roughly 360 miles south of Glacier