Hello.
I’m local round here.
Climachx and the Dyfi Forest in general has a wide range of singletrack, from fun and flowy to full-on hardcore. If you’ve come from trail centres, expect to find it rocky and slippery in the wet, as this is slate country! Each climb is 250-300m. Phone signal in the forest is poor, so don’t expect all mobile apps to work.
The Mach Trails are old-skool XC trails (now known as Epic, Backcountry, Adventure…) taking in vast views and landscapes. They are not technical in the modern sense, but If you know how, they can be linked all the way to Nant Y Arian making a great day out.
Useful links are:
http://www.Dyfimountainbiking.org.uk – maps and info for DIYers
Trail Forks – more of the off-piste stuff.
Facebook: Climachx Trail Page and Dyfi Mountain Biking Group for all your questions.
http://www.bikecorris.co.uk – for a guided weekend.