I generally carry my Legend in my pack and only turn it on to check locations or mark a waypoint.

However, on some walks I have had it on the whole time more for entertainment reasons than navigation. I have one of those radio pouches from Country Comm and the Legend will just squeeze into that. You have to listen that you have not pushed the mouse down though. This radio pouch has a horizontal belt velcro arrangement that works great with my backpack straps. I have the pouch mounted on my left shoulder strap almost at shoulder level. It keeps tracking there and is easy to pull out to refer to.

I think Country comm has two versions of this pouch....I have the shorter one and the flap barely velcros shut....get the longer version I think.