Complex sentence: The main roads within the BRWMU include Forest Road 10, which runs along the north side of the river between the community of Bull Run near the mouth of the river and Forest Road 18 (Lolo Pass Road) east of Bull Run Lake.
Split into simpler sentences: The main roads within the BRWMU include Forest Road 10, which runs for much of its length along the north side of the river. It links the community of Bull Run near the mouth of the river and Forest Road 18 (Lolo Pass Road) east of Bull Run Lake.