Find International Races
While there are several methods to search for specific distance races around the globe, I have found the Ahotu Marathons site to be an outstanding site for searching and learning about half marathon and marathons races across every continent and country . They also provide links to the actual race websites, and they cater to people attempting to perform goals such as running a race on seven continents. This is an excellent site for anyone wishing to combine running with visiting many continents and countries. The site allows searching for races by country and date combination
Another site that can be used as a resource for finding marathons around the globe is Marathon Guide. This site also provides information on ratings and comments on past races. It contains news articles on recently completed races (winners, etc) and upcoming feature races.
The races listed on Ahotu Marathons and Marathon Guide overlap to some extent, but are not identical, so it may be useful to search both sites to find a race in a specific date range and location.