46 miles or so?

Went on a ride w/ our local group - decided to stick w/ the Bs, and the slowest half of them. By the 5th mile, the ride leader's bike broke down - sheared off the rear derailure cable, and kaput! So we were told to catch the other half of the Bs. Weren't able to do that. I spent a lot of time communicating w/ those at the back & those at the front to try to keep us together & motivated. Around mile 15, after going thru construction, gravel, and a small detour, realize that the person up front took us the wrong direction - so that added a 3 mile detour. By mile 20, one of the riders decided to bail, and wait for a ride home. Mile 30ish, we get to a small climb. Over a recently pebbled / gravel covered hill. where did all those rocks come from?! One of the guy's chain seized, and down he went, middle of the road, and we had to jump to keep oncoming traffic away. Walked the hill, (too steep & rock covered to start riding again) and made it down in tact, rolled in to the finish about 1 hour later than the group we were to catch. Exhausting!