Trans-Sweden (Sweden)
The route starts at the southern-most point of Sweden, Smygehuk. It travels through all of Sweden, some days i Finland and finish at the northern most point, Treriksröset in Sweden.
The straight-line distance is 1572 km. By roads it is a bit over 2000 km.
I ran with a babystroller, slept all nights in hotels/hostels, had no rest days, had no sponsors. I am 74 years old.