Because of their restricted range, they are vulnerable to extinction from habitat alteration due to water management of Bear Lake and its tributaries. The Idaho Department of Fish and Game is working with the Utah Division of Wildlife Resources, water managers, and landowners to reduce impacts to these fish from habitat loss. Bonneville Whitefish spawn in November and December. Spawning occurs in shallow water and females lay between 600 and 900 eggs. This species may attain lengths of 30 cm.
Fish are sexually mature at age three and six year old fish are common.