First we need to be clear - "real" logging railroads ceased to exist in the US when Oregon American shut down in 1957. All railroads since then that haul logs are doing "short line" railroading although many of those operations had more than a little flavor and stlye of the old logging lines.
The only log haulers still in existance in the US is St Maries RR in Northen Idaho and a very truncated Simpson in WA state. Potlatch's Jaype branch out of Orofino in Central Idaho was shut down a couple of years ago and I understood it had been scrapped. But maybe that's not the case.
The last log hauler in Oregon was the Oregon California and Eastern out of Klamath Falls. It shut down in 19906.
Because of regionalizing of former mainlines, logs are again being hauled on a regular basis by Central Oregon RWY, Portland and Western and BN. We don't really count these with the three mentioned lines above because they are essentially mainline railroads hauling logs as opposed to lines that have always been dedicated to hauling logs and not much else.
Sort of an honorable mention goes to Weyerhausers Columbia nd Cowlitz even though it really no longer hauls logs to speak of.
Narrow gauage? Well we would say West Side but again, in 1961 it was short line log hauling - not railroad logging. Biles Coleman in Eastern Washington and the many hundreds of miles of connecting lines to the Sumpter Valley RWY in Eastern Oregon was a memory after 1948 and 1947 respectivly.
In the Northwest narrow gauge log hauling was not very common owing to the size of the logs. The SVRY was unusual because there was a common connection in the 3 foot SVRY. On the Wet side of the Cascades it gets a lot slimmer although the bastard guage Yeon and Pelton is interesting.
Lon
