The national database of all ongoing clinical trials, maintained by the National Institutes of Health, is the place to start your research. Another database, maintained by the National Cancer Institute, allows you to search by zip code (or by a specified number of miles from any given zip code), which is useful if travel for the trials isn't an option. Keep in mind, though, that it could be worth traveling if the right trial is only available elsewhere.
You can search these databases by condition (such as breast cancer), by the name of a particular drug being tested, by sponsor, or by location. You can also customize your search by typing in a string of terms, such as inflammatory breast cancer, stage IV.

