The Renaissance Ring is a fascinating 250km route surrounding Florence. The shortest route I have without detours is 130 km. You pass through historic centres, castles, parish churches and various landscapes from the river bank to the mountains. the route is of medium difficulty and crosses dirt roads, easy paths and asphalt.

https://www.visittuscany.com/it/itinerari/anello-rinascimento/

I suggest this FKT Route because:

1. It's geographically and landscape-wise relevant

It starts and finishes in Annecy, nicknamed the "Pearl of the French Alps". The path is around the blue water of Annecy's lake and it is sorrounded by the highest and most spectacular mountains in Europe.

The path itself is one of the most famous and ancient cycle route ("voie verte") in France. Being a cycling route, the route is pleasent and the car traffic is not a problem

The Hertogenpad (the dukes path) is a special combination of greenery and conviviality. The 238 kilometer long path leads you past welcoming Brabant villages, dust, sand and peat swamps, over purple heathlands and sometimes swampy bat paths. The walking route from Breda to Roermond is a special series of beautiful nature reserves such as the Loonse and Drunense dunes, the Maashorst and the Groote Peel. It is one of the LAW paths in the Netherlands (long distance hiking) and is also called LAW 13 (picture).

Gans Creek Wild Area Trail is loop trail with a "lollipop stick" extension. The trail is moderate and consists of small stream crossings and hills that flow into Gans Creek, which is surrounded by high bluffs. The trail offers a nice mix of hardwood forests, cedar thickets, creek bottoms, and limestone bluffs. It contains areas with steep grades and inclines more than 10%.