Named after the largest mountain in the United Kingdom, Snowdon (1,085 meters/3,560 feet), Snowdonia National Park also includes the breathtaking ocean views of the Llyn Peninsula and a number of worthwhile climbs and elevation hikes within the mountain range.
The most popular destination for adventurers is Snowdon itself, which has numerous routes to its peak, including the difficult Crib Goch, which climbs the mountain's ridges that surround the elevated lakes at its center. Tryfan peak is less traveled by tourists and a much easier climb if you tackle its northern route, which begins near Idwal and Ogwen Cottages and makes for over half a day of hiking. True adventurers will make the hop between the two large monoliths at the peak known as Adam and Eve, made all the more frightening due to the precipitous drop on one side.
There are a number of other fantastic hikes to draw you out into the fantastic scenery of northern Wales, including the moderate, day-long challenge of Watkin Path or the few hours of walking that will make a dip in Cynfal Falls an enticing destination. There are dozens more ways to enjoy the full expanse of Snowdonia and not all will have applying ice bags and praying for a long bath. Check the official site for more information, while the other links will direct you toward extreme sports like rock climbing, 4-wheeling, ziplines, and cliff jumping.