North Wales truly is a stunning part of the world. The Snowdon (Eryri) area is quite possibly the most stunning part of all. The climb to the top of the mountain can be as easy or as difficult as you like. There is a train that runs to the top for the least fit ... and there is the horseshoe for the most fit.
My brother and I climbed to the top via Crib Goch (Red Ridge). The exposure on this route is extreme and not for the weak of will. Though the route itself is not overly difficult, the penalty for failure is most probably death on both sides of the ridge, and many people suffer this fate every year. When you take these factors into account, the views are truly amazing. The grades on the ascent of Crib goch vary from a level 1 scramble to serious rock climing in the 5.10 to 5.12 range. I'm sure if you looked hard enough you could find routes with more severe grades.
Honeslty, the top is a little bit of a let down ... it's usually packed with tourists. And since it's Wales, the possibility of snow/rain/cloud is very high. So keep in mind vistas could be very limited. But on the right day, it's something else.
My brother and I started and ended at Pen-Y-Pass and it took us about 8-9 hours to complete our route at a brisk pace.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.