The organizations, and especially Flanders Classics, release very little information about the routes.
This is partly due to the fact that here in Belgium we may get a new heavy lockdown.
And they still want to keep the races going.
We know this about Gent Wevelgem;
https://www.nieuwsblad.be/cnt/dmf20210323_95303668
The plugstreets and the hils are listed and there is also a map of the route, but no detailed directions or gpx.
This route is 95% similar to the real October 2020 race.
Dwars door Vlaanderen; all we actually know;
https://sporza.be/nl/2021/03/02/kruisbe ... 718149867/
But I do expect a similar list with the hills and cobblestones in the coming days.
We know that the course has changed a bit compared to 2019;
"de Nieuwe Kwaremont" is replaced by "de Kluisberg"
"de Kluisberg" is visited again 35 kilometers later
The last kilometers of the final will also change, but will remain flat.
I think it is possible to opt to ride an older version this year. Exact info isn't going to be released until a day or two before the race.
It will also be difficult to find exact routes for "de Ronde" and the Brabantsepijl.
But I keep looking and if I find something I will let you know!