Can't be done on the unit itself. You have to attach it to the computer and delete the .gpx file that contains the cache (or caches). You will want to use this thing with PQs. If you send one cach at a time to the unit from gc.com, you get one .gpx file per cache. That makes the whole file managment thing much more painful. Tom ________________________________ From: Bob TheCacher <cachefinder@xxxxxxxxxxx> To: geocaching@xxxxxxxxxxxxx Sent: Wed, November 3, 2010 8:29:18 AM Subject: [GeoStL] Help with a Colorado 400i I just purchased a Colorado 400i and loaded a couple of caches in it. So now I'm ready to delete them from the unit. I can't see anywhere in the Manual or on the screen on how to erase them from the unit. Can someone tell me how to do that? thanks (Name withheld since I have a Masters degree and feel bad I can't figure this out)