Chatelherault - pronounced shat-le-row is in Hamilton, Lanarkshire.

Walks vary from 20-30mins to 2-3 hours.
All off lead through well signposted pathways - its 95% woods with a large river at the bottom for swimming.
Signposted from the M74 so easy to find

And there is a dog wash there if your pooch gets too mucky on the walk

great place, i remember going with my parents when i was younger.