Dyffryn Mymbyr is a valley in Snowdonia, in north-west Wales, approximately 5 miles (8.0 km) in length, and leading up from Capel Curig to the Pen-y-Gwryd hotel.
Dyffryn Mymbyr is also the location of 'Dyffryn', the farm in Thomas Firbank's best-selling autobiographical novel (first published in 1940) entitled "I bought a mountain".
The location of Dyffryn Mymbyr, the farm, dates back to 1350, and the current property is now owned by the National Trust.
Very soon after eruption roughly spherical pilli - droplets of siliceous magma - of similar density to the ignimbrite fell into the still hot and fluid deposit.
The "Heritage Walk", produced by the "Friends of St. Julitta's Church" in Capel Curig, circumnavigates the whole village and takes about 3 hours.
[2] There is Moderate (Mod) to Very Difficult (V Diff) climbing on "The Racks" near Dyffryn Farm, "The Pinnacles" (Y Pincin to the locals) in the centre of Capel Curig.
The lake Llynnau Mymbyr is actively used for kayaking and canoeing both by Plas y Brenin and many local education authorities.
The Dragon Ski Club was successful both in the UK but also abroad, culminating in winning the home championships beating, England, Scotland and Northern Ireland, held in Val D'Isere, France.