1 Sierra Madre Occidental 1

2 Yucatan Peninsula 2

3 Baja California 3

4 F E G D Gulf of California

5 F E G D Gulf of Mexico

6 F E G D Bay of Campeche

7 21 20 11 1 Mexico City

8 21 20 11 1 Guadalajara

9 21 20 11 1 Mazatlan

10 21 20 11 1 Mexicali

11 12 3 18 2 4 Tijuana

12 12 3 18 2 4 Cuidad Juarez

13 12 3 18 2 4 El Paso

14 12 3 18 2 4 Eagle Pass

15 12 3 18 2 4 Laredo

16 K Conchos RiverZ L w

17 Chihuahuan Desert

18 Sierra Madre del Sur

19 5 15 13 11 McAllen

20 19 1622 8 Piedras Negras 23

21 17 6 7 10 14 Reynosa

22 19 1622 8 Brownsville 23

23 19 1622 8 Tampico 23

24 17 6 7 10 14 Veracruz

25 Sierra Madre Oriental

26 17 6 7 10 14 Acapulco

27 17 6 7 10 14 Monterrey

28 17 6 7 10 14 Saltillo

29 5 15 13 11 Matamoros

30 19 1622 8 Puebla 23

31 19 1622 8 Calexico 23

32 F E G D Pacific Ocean

33 5 15 13 11 Chihuahua

34 Isthmus of Tehuantepec

35 Sonoran Desert