is it possible to cycle from Snowdon to Antur Stiniog?
on the road…yes
over the mountains – I highly doubt it!
There are 8 walking routes up snowdon, I think only about half of these are ridable – Rhyd Ddu, Snowdon Ranger, Llanberis. The first of these isn’t often done I don’t think. the Ranger is quite popular due to it’s relative quietness of walkers compared to the Llanberis.
I am not sure if the Watkin has ever been done but you’d not ride off the summit in a hurry!