Some Cambrian Series stats for you. Since 1 January 2008 there have been 273 entries and 136 completed events (though its impossible to know how many of the missing cards are DNFs or still mouldering on the shelf somewhere). I'll honour any card that I've issued, so if you fancy one of the best permanents rides in the best scenery possible, then empty out that cupboard, find the thing, and ride it.
The most popular events are:
C2B (41 completions - although most of those are by one rider)
C2A (14 completions)
C1B (13 completions)
C2C (9 completions)
C3A (9 completions)
C2E (6 completions) and
C6A (6 completions) - well done those riders!
The C6B, C4A, C4E, C4F, and C4G have no completions, although the C4F and C4G have been ridden twice as together they form the C8A. The C4A is the only event that has never had an entry. Am not sure why Llangollen - Prestatyn - Mold - Conwy - Ffestiniog - Bala - Llanidloes - Machynlleth - Llangollen isn't attractive - there's a chance for a couple of crossings of the Berwyns, the mighty Bwlch-y-Groes and some rarely explored ground in North Wales.
The ride with the worst completion rate is the C2G (1 out of 11 brevets issued) though I suspect that is DNS rather than DNF - again it is North Wales - Bala - Festiniog - Conwy - Mold – Ruthin - Llangollen - Bala - so perhaps Northern riders have a feast of other hilly perms that they can do around the Pennines and so are not tempted into darkest Wales.
Best years for completions: 2011 (26), 2014 (25), and 2010 (24). There were only 7 in 2013 but I think a forum place and paypal entries have helped to keep the series alive.