Ahh, you see. Similar to jimbob, I name my tracks so I can see at a glance where I walked. I rarely convert them to routes for others to follow as many include paths not marked as RoWs, if you get my drift
To be honest, this is the first time I've realised there's no "word" search function for this. Normally I'll look at "stats" which can be sorted/filtered but on this occasion I wanted to find when I last did this particular walk. Got my answer in the end by filtering alphabetically and trawling through thousands of tracks