<Li> turns south and follows the border between Oregon (west) and Idaho (east) </Li> <Li> turns east and follows the border between Idaho (north) and Nevada (south) along the 42nd parallel north to longitude 114.041726 W . </Li> <Li> turns south and follows the border between Nevada (west) and Utah (east), except for following the west city limit line of West Wendover dividing it from the rest of Nevada, and putting it in the Mountain Time Zone . Jackpot, Nevada, just south of the 42nd parallel and some 25 miles (40 km) west of the time zone south turn, also observes Mountain Time, on an unofficial basis . </Li> <Li> follows the border between Nevada (west) and Arizona (east) </Li>

Map of the united states with the time zones