No species line was published for this address, so what it will and will not take is a question for the mill itself. The species guides are the other half of that conversation: what you are holding, and what it is normally worth.
It is one of 2 facilities listed in Jefferson County, which is where a search for a sawmill near me starts if your ground is in that county. The Jefferson County section of the state page has every one of them side by side, and all 99 Montana listings run across 26 counties - which is the map that decides whether a load leaves your gate for twenty minutes or two hours.
Anybody searching for a sawmill near me needs more than one gate. If this one will not take your wood, the nearest other listings are Woody's Lumber & Sawmill in Helena, 16 miles away, R-Y Timber, Inc. Townsend in Townsend, 25 miles away and Sun Mountain Lumber in Deer Lodge, 36 miles away. Distances are straight lines between the coordinates the sources published - not road miles, and not a statement that anybody is buying.
None of this says whether the gate is open or what the load would fetch - no agency document records that. A price comes out of a sale run properly: the landowner's guide to selling timber takes the steps in the order they happen, and sealed bidding puts one tract in front of several buyers at once instead of taking the first number offered.