The atlas has 4 trails of this kind, across Denmark, Estonia, Finland, Germany, Italy, Latvia, Lithuania, Norway, Russia, Sweden, and Switzerland, from 77 km to 7,114 km. Each comes with its length, days on foot, best months and a link to the official site.
Lithuania, Latvia, and Estonia · 2,141 km · 102–114 days
A long-distance trail through the forests of Lithuania, Latvia and Estonia, from the Polish border near Lazdijai to Tallinn, forming the Baltic part of E11.
A 77 km forest trail through Valdai National Park in Novgorod Oblast, walked in five to seven days between seven equipped base camps, past lakes, beaver rivers and a suspension bridge over the Polomet.
An 82 km one-way trail through Oulanka National Park near Kuusamo in north-eastern Finland, past foaming rapids and seven open wilderness huts, walked in three to seven days.