Originally Posted by uncadan8

Don't mind the cryptic one (The Historian), Volksdragon. To begin extending your distances, you need to ride beyond your comfort zone just a little bit each time you ride. If you begin to feel a bit worn out, set a short goal just ahead of yourself, like a stop sign that you can see down the road, or a building or something, and make that your turn around point.

But to build your fitness for longer rides, you might want to try making each ride have a different purpose, i.e., make one ride fast but short; make the next ride longer but very easy paced; make the next one a ride where you find as many hills as you can or just ride the same hill several times. This will give your body some variety and keep the riding fresh...and fun! Rotate the types of rides you do and you will find yourself riding 25-30 miles on a regular basis.

And to put a slight twist on what The Historian said, take a break when the riding isn't fun. Your body needs its rest, too!