<Li> divides a very small portion of extreme western Kansas bordering Colorado (Greeley, Hamilton, Sherman, and Wallace counties) from the rest of the state (three other counties which border Colorado--Cheyenne, Morton, and Stanton counties--observe CST) </Li> <Li> follows the border between New Mexico (west) and Oklahoma (east) </Li> <Li> follows the border between New Mexico (west) and Texas (east) </Li> <Li> divides El Paso County, Hudspeth County, and a portion of northern Culberson County that includes eastern Guadalupe Mountains National Park from the rest of Texas </Li>

How many time zones are there in the continental united states