Adventure, such as mountaineering, diving, flying, sailing, and exploring is a form of escape from a mundane existence, true, but it is more. It brings us back into contact with the simple things of life. Simplicity is often the soul-mate of happiness.
Simplicity is a desire to be alone with one's self or with another person in like circumstances.
A few bike links I have found on the web. Here I am running up Pikes Peak. These are some of my favorite links to running web sites. Some of my favorite adventure sites are here.