Terry Sonner, 33, collapsed after his fire crew finished training Wednesday at the Hammett Guard Station.
Crew members began medical treatment and called for medical assistance but were unable to revive him.
“We have lost an amazing wildland firefighter. He will be greatly missed by his family, friends, and the wildland firefighting community,” Andy Delmas, a Boise BLM fire management officer said in a written statement.
Sonner was a veteran wildland firefighter. He began working for the BLM in 2001 and worked his way up to become the fire operations supervisor of the Hammett Guard Station engine crew for the Boise District BLM. He previously worked for BLM districts in Twin Falls and Elko, Nev.
He is survived by his wife and children, the BLM said.
The cause of Sonner's death is unknown, the BLM said. The agency said it has appointed a team to assess the circumstances surrounding Sonner’s death, in hopes of preventing future incidents.
Funeral services will be announced as soon as they are determined, the BLM said.
Sonner’s family has asked for privacy as they grieve.
Hammett is located 62 miles southeast of Boise and 19 miles southeast of Mountain Home. The Hammett fire station is one of three stations operated by the BLM in southwestern Idaho. The others are at Middleton and Bruneau.
Sonner was the first Idaho wildland firefighter who has died on the job since 2013.