December 1999, 173 in the Tweed Valley in Northern NSW, including about 20km on dirt roads. Actually, it's now one of my regular century "training" rides, so beautiful is the scenery in that part of the world (although I've changed the route after Uki to add more dirt and less suburbia). The thing I recall most about the first ride is that it didn't actually dawn on me for a while that I'd gone over 100 miles. I just thought of it as preparation for my first tour which was about six weeks away, and beating my previous best distance (155km).
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I am clinically insane. I am proud of it.
That is all.