Question: The Boulder Mountains are a mountain range running north–south west of Boulder between Helena and Butte in the U.S. state of Montana, parts of the range are in four different counties, including Deer Lodge County is a county in the U.S. state of Montana, and was founded in what year?
Sentence (from "Clark Fork River"): The Pend Oreille River in Idaho, Washington, and British Columbia, Canada which drains the lake to the Columbia in Washington, is sometimes included as part of the Clark Fork, giving it a total length of 479 mi , with a drainage area of 25820 sqmi .
Relevant evidence: No