We were coming down Dunraven Pass in Yellowstone Park which is an 8000 foot pass, I believe, on a winding steep and narrow road with no shoulders or guardrails. We met several older people coming up the pass making almost about a 2 mph headway, blocking motor homes and camper trucks behind them. While I applaud their attempt to bike the pass, I couldn't do it, that was a very dumb thing to do. It could have lead to a very serious accident when backed up traffic attempts to pass them with a good chance of running opposite traffic over a drop off.
Bob