Too much for me, but I’m a notorious mincer!
The ride up to Llyn Colwyd from the A5 between Tryfan and Capel is fine, but can be wet and it can be tricky finding the right path the first time you do it, if you’re an idiot like me.
The North side of Colwyd is (was?) rutted and a bit rocky, can be hard to keep up momentum, lots of pedal strikes.
Steep tarmac downhill and a breather takes you to Llyn Crafnant. The southern side of the lake is a little hardpack and then tarmac, but goes past a really nice caff, the northern side is fireroad/doubletrack, a bit more interesting but no caff and more wooded, so not as nice views.
At the end of the lake you go up past the old Mynydd Climbing Club Hut to a very rocky saddle before a narrow and rocky (in places) descent back to Capel Curig.
I find it very tiring, both mentally and physically.
None it flows, you have to concentrate.
It makes a nice walk though. 🙂
Bear in mind I’m old and ride a steep XC hardtail.
If you’re fit and with a suitable bike I’m sure you’ll love it.