If you followed my previous hikes, you know the CDT wasn't the first time I hiked a long-distance trail in a flip-flop direction. I skipped 22 miles of the Appalachian Trail in New Hampshire because of an injury, then returned to finish that section after reaching the northern terminus at Mt Katahdin.
My hike of the Pacific Crest Trail in 2019 included a triple flip. The first was a flip from the California desert to Washington to avoid higher-than-normal snow conditions in the Sierra. Later, I flipped again to hike the Sierra while the weather remained nice, then made a final flip to finish Northern California.
A few hikers don't like to flip. They think of the trail as a linear, continuous path that should be walked only in one direction. A flip-flop hike isn't unusual, however. Every year, hikers do the same thing Top O', OldTimer, and I are doing.
I know we aren't the only hikers who started northbound on the CDT this year and are now hiking south through Colorado. There aren't many of us, though.