HUC Region Maps

01	New England Region	major roads	water only	HUC lines	HUC cells
02	Mid-Atlantic Region	major roads	water only	HUC lines	HUC cells
03	South Atlantic-Gulf Region	major roads	water only	HUC lines	HUC cells
04	Great Lakes Region	major roads	water only	HUC lines	HUC cells
05	Ohio Region	major roads	water only	HUC lines	HUC cells
06	Tennessee Region	major roads	water only	HUC lines	HUC cells
07	Upper Mississippi Region	major roads	water only	HUC lines	HUC cells
08	Lower Mississippi Region	major roads	water only	HUC lines	HUC cells
09	Souris-Red-Rainy Region	major roads	water only	HUC lines	HUC cells
10	Missouri Region	major roads	water only	HUC lines	HUC cells
11	Arkansas-White-Red Region	major roads	water only	HUC lines	HUC cells
12	Texas-Gulf Region	major roads	water only	HUC lines	HUC cells
13	Rio Grande Region	major roads	water only	HUC lines	HUC cells
14	Upper Colorado Region	major roads	water only	HUC lines	HUC cells
15	Lower Colorado Region	major roads	water only	HUC lines	HUC cells
16	Great Basin Region	major roads	water only	HUC lines	HUC cells
17	Pacific Northwest Region	major roads	water only	HUC lines	HUC cells
18	California Region	major roads	water only	HUC lines	HUC cells

There is a page that gives the color scheme for Graphical Locater Maps.