Highway 139 From Klamath Falls to Susanville

Will be towing a 25' Travel Trailer. What are the road conditions in late September or is there an alternate route to consider. Thx

This is an excellent road. Near Susanville there is a long hill but it is easily doable with your 25 foot trailer. Very little traffic. I always travel 139 between Klamath Falls and Susanville.