I just started a new Blood elf Paladin and have made it outside of the Blood Elf starting area. Will I have to come back to the Blood Elf starting area to train my Paladin's skills? If not, then where are the Horde Paladin trainers located at?

There are three major places that will have paladin trainers where you can always learn new skills and abilities. As you level your paladin, you will travel to different areas of the game and have access to better trainers and higher skills.

Silvermoon City(in the Farstriders' Square), Undercity(inside the Royal Quarter), Orgrimmar(inside Grommash Hold), and Eversong Woods(at the Sunspire…which is the Blood Elf starting area) are all the places for the Horde and there are plenty of Paladin trainers in each one where you can hone your Paladin's training and skills to create the best possible combination for you. Each different city will offer the same basic skills from Paladin trainers, but there are always different weapon trainers in different cities where you can learn different skills. Depending on which skills you are after, you may have to travel all over the game.

No matter which race you are, a Paladin is always a sought after player for any group or instance, so be sure that your skills are always at their peak for your level. As soon as you level to even levels, (such as 26, 28, 30, and so on), you should try to hit a Paladin trainer to gain any new skills that are available to you. This will ensure that you are always on top of things and that you won't be lacking a vital skill when you need it most.