Trail Creek Fire approaching 28,000 acres, Alder Creek tops 7,200 acres InciWeb By: MTN News and last updated 2021-07-25 18:46:12-04 The Alder Creek and Trail Creek fires on the Beaverhead-Deerlodge National Forest have now burnt more than 35,000 acres combined, as the Christensen Fire grew to 1,274 acres as of Sunday morning. An update from the Southern Area Incident Management Blue Team says fire activity picked up Saturday on the Alder Creek Fire west of Wise River. The fire has crossed Alder Creek and is now established on the north side of the drainage. Containment lines to the east of the fire are holding as crews continue to prioritize structure protection.