The text describes outcrops of Comanchean strata around Lake Travis on the Colorado River between Austin and Marble Falls in central Texas (Fig. 1). The exposures selected are readily accessible and can provide a good understanding of the vertical sequence of Upper Aptian through Middle Albian rock types. Appreciation of the three-dimensional relationships will require study of the listed publications. Many good exposures occur on private property within the region, but most are not indicated in the guide. The geologist in central Texas is well advised to refrain from crossing any fences for any reason without prior permission from the landowner (and land manager, if appropriate).