I'm not too familiar with biking in the Augusta area because I live further upstate on the coast. However, I suggest that you check out the Bicycle Coalition of Maine web site-- www.bikemaine.org. It is a great organization that supports cycling in Maine and I believe that they list rides/bike shops in the Augusta area.

Also the Dept. of Transportation in Maine has a nice web site geared to bike tours - http://www.exploremaine.org/bike/bike_tours.html

Depending on when you come you can expect it to be a bit cooler than you are used to on the west coast!

Cheers,
traveller_62