Just finished the (virtual) Appalachian Trail

Garmin, which I use for my fitness and activity tracking, has a range of challenges through its app. These include a whole series based on the distances of iconic trails (there's a whole other series based on mountains that track elevation over time). Just simple little motivators.

At the beginning of the year I started the virtual Appalachian Trail and just finished - 3500km (2175 miles) in 177 days.