The Taff Trail is a route between Cardiff Bay and Brecon - suitable for walking or cycling. I've cycled the route between Sophia Gardens and Castell Coch on a few occaisions. At Bute Park there is a car park and heading into the park, you can cycle along either side of the river bank. It is well signposted but the paths are quite narrow at times.
The route will take you through Hailey Park then into Tongwynlais. The Lewis Arms is a great little pub for refreshments before cycling back - or for the more adventurous, you can cyle on up to Castell Coch. (It's a killer of a hill!)
There is minimal road usage between Cardiff Castle and Castell Coch and i love the route because of this. There are some stunning views on route too. read more