EuroVelo 11 is called 11 the East Europe Route and connect (theoretically) the North Cape with Athens. On the state of the route, there is an OpenStreetMap wiki page 
for the Baltic States
The route is marked on Estonia’s National Route No. 3.
You may find the route on the Cycle Map Estonia:
1) You may find the whole route on the 2020 cycle route overview map:
2) You may find the route on the route description “EuroVelo 11 in Latgale” (South East Latvia):
in 2021/2022 there is a revised EuroVelo 11 route for Lithuania in the discussion.
See it here:
Basic (a bit outdated information) you may find in the BaltiCCycle.eu route descriptions
- “Riga-Vilnius by bicycle” (LT3/LV3) from 2005 and
- Warsaw-Vilnius (LT1) from 2004
No. 11 Athens – North Cape