Tri Zones Training

The next generation of sports drinks, Accelerade’s unique ratio of 4 parts carbohydrate to 1 part protein facilitates superior athletic performance and endurance.
http://www.accelerade.com/

The Austin Cycling Association is dedicated to furthering bicycle access, safety, education, and enjoyment in Central Texas by sponsoring weekly bike rides, training, informational programs and an annual charity bike ride; the Armadillo Hill Country Classic (AHCC). The AHCC benefits bicycle safety education and free helmets for kids. By joining ACA, you'll receive many benefits, including a monthly newsletter and access to dozens of route maps for rides all around town.
http://www.austincycling.org/

Here is a map of the infamous Dam(n) Loop:

http://bicyclesportshop.com/page.cfm?PageID=218

Complete triathlon and bike shop with the most courteous and friendly staff in town.
http://www.jackandadams.com/

Officially dedicated in April of 2006, Lake Pflugerville is new place to swim, bike, and run. The 180-acre lake is ringed by a 3.1 mile crushed granite hike/bike trail. The country roads in the area provide many miles of cycling routes.

The lake is located at the northwest corner of Pfluger Lane and Weiss Lane. Click here for map link to the intersection (the lake is not on Google maps...
http://www.cityofpflugerville.co...

The Shoal Creek Trail is a beautiful trail that runs next to Shoal Creek. Parts of it are paved, and parts are packed gravel. The trail runs from just north of 38th Street (where Shoal Creek Blvd. dead-ends into 38th) all the way down to Lady Bird Trail.
http://www.txinfo.com/products/S...

Friendly cycling shop off Anderson Mill Rd. and RR 620 -- not too far from 183 north and close to Cedar Park. They offer weekly bike rides and periodic info clinics.