The Bryan Chapman would be a good template, decent mix of scenery in Snowdonia / Cambrian mountains and elevation isn't gratuitous. It's 300 each way, to make up the 400 you could add something on -one suggestion would be to turn at Bronaber towards Welshpool.
Stunning and super remote, some long gradual climbs. Photo below from when I was there in July.
Then maybe route South from Welshpool and rejoin the Chapman route.
The Bryan Chapman would be a good template, decent mix of scenery in Snowdonia / Cambrian mountains and elevation isn't gratuitous. It's 300 each way, to make up the 400 you could add something on -one suggestion would be to turn at Bronaber towards Welshpool.
Stunning and super remote, some long gradual climbs. Photo below from when I was there in July.
Then maybe route South from Welshpool and rejoin the Chapman route.
Both routes below.
https://ridewithgps.com/routes/20922029
https://ridewithgps.com/routes/40778773