I do the majority of my caching on a bike. But of course this becomes more challenging once all the nearby caches have been cleared out. I've found all the caches in my hometown and a neighboring town, so it now takes a minimum round trip of 24 miles or so to reach the nearest cache (not counting the ones high up on the hills). So, in order to reach the outlying caches, I sometimes will drive to a convenient spot with my bike then start riding from there. But there are some cautionary tales to tell. Sadly, several months ago I was caching on my mt bike and stopped to get something to eat. I watched the bike the entire time like a hawk, except for the 30 seconds to hit the restroom. That's all it took for some low-life to steal it, and this was at a busy place with lots of customers.
So now, I use my road bike for caching everywhere, including moderately steep dirt trail climbs. It's not a cross bike, so I still have skinny tires on it, but after shredding the ones I had, went out and got some nice, tough tires (still 700x23c sized) that can stand up to the gravel and dirt terrain. My next bike purchase won't be a mt bike to replace the one stolen, but instead a cross bike with stronger brakes, wider rims/tires, and lower gearing that can be used on all types of terrain, but not slow me down (too much) on the paved roads.
BTW -- my name "AllezAllez" is pronounced a-lay a-lay, and it is a common French phrase used at cycling races that means "faster! faster!" or, "let's go!" or "c'mon, you can do it!" Basically, it is shouted at the racing cyclists as words of hope and encouragement. I used to do a lot of amateur racing, but not much anymore.
