You don't have to give up your fitness routine just because you're on the road. A running program is easier to maintain while traveling than many other forms of exercise because you don't need much equipment -- just your favorite running shoes.
Here are some tips from Runner's World magazine to help traveling runners:
Ask where not to run. Unless hotel personnel are runners themselves, they won't be able to map out a route for you. They will, however, know which areas are and aren't safe.
Run by the watch. If you forget distance and run for a set period of time, you eliminate the need for a preset route.
Run out-and-back courses. Make it simple, and you won't get lost.
Look around. Use your runs to explore and enjoy your new surroundings.