Time Trials is basically, going round the map on race, nav to nav trying to get the quickest time you possibly can (without lag), on the maps. We basically nly focus on Gephy, Blood Gulch, Timberland, Danger Canyon, Ice Fields, Death Island, Infinity and Sidewinder, in a 1 way rotation, at these are the maps played in our servers.
Hope that answered your question
~Nemesis
Also, the monthly Time Trials that are posted are only reserved for people on ventrilo (guests and BFM members)
You can post your times in the *unofficial Time trials* topic.