Day rides on the GAP trail
In 2018, at 65 years old, I did a pair of out-and-back day rides on the GAP trail. I waited for nice weather in July, sunny but not too hot.
I was in no hurry, so the pace was mostly easy-to-moderate. (A ride this long is still a lot of work.)

Day 1: Connelsville to Confluence and back. The trail looks very different later in the day, riding in the other direction. I like these out-and-back rides.
Stats: 56 miles, 12.7 average (that average is a few mph slower than my local road riding -- the trail surface is hard packed "crushed stone", but it's still slower than paved roads. 32mm or larger tires with minimal tread are optimal for this nice surface.)
Riding time: 4:25, with a total time of 6:55! I stopped for photos a lot, and stopped for lunch in Ohiopyle on the return.

The GPS stats from Strava:
This chart is by Time, instead of Distance. I marked the short photo stops in orange, the longer stops in red.
The elevation gain is 400 feet in 23 miles, that's just 0.3% average grade. It's interesting that I could tell the difference on the return! A mph or so faster!
My ride notes say "forest and river" and that I had a shaded trail all day. "could be the best part of the GAP trail".



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Day 2: Rockwood to the PA state line -- Passing the Eastern Continental Divide. I rode over the long viaduct on the ride. There's a cool Mason-Dixon monument at the state line with the border marked in stone paving across the trail.
That's 47 miles round trip, with the first 20 miles riding up the grade to the Divide, 550 feet, 0.5% grade. That's a nice downhill back to Rockwood on the return!
I wasn't sure in advance how far I wanted to go that day. Back at the car, I did another out-and-back in western direction, to the long Pinkerton Tunnel. That was good too. This added 18 more miles.

Stats: 66 miles, 12.4 mph average. 5:19 ride time, 7:38 total time.