Do you have any idea why there was a phone line between Round Lake and the Rho Ridge trail? The 1938 map shows it:
This is a forum for trip reports that pre-date the Portland Hikers forum, trail photos from pre-digital era, or any other discussions that focus on trail history.
I haven't seen any explanation. Obviously the line was there before the road was built. My best guess is that, back in the day when the whole area was open to grazing, there may have been some kind of monitoring crew at the lake (counting sheep was the main reason for many of the original guard stations) although it's clear there wasn't a cabin there.