I am just the same, I love to get my walking boots on, get to my chosen walking route and get as high as a damn kite. These days I have a Memory Map GPS unit so I can't get myself lost. Good dope, walking in the countryside and a GPS unit seems to be a great combo.
I was out walking with the wife a few weeks back and we came across a group of guys that were walking and doing their best to hide the fact that they were all smoking joints. They took paranoia to new levels, it was funny to watch them sweat (I look pretty straight in real life, not the hippy you all imagine). Anyway, none of them offered me a toke which was a shame.....