||08-07-2011 04:09 PM
The drain might not go anywhere, it might just be a grate covering a hole. Getting the packed debris out of there would be the first thing I'd do. The snake you're using night be too small to get through all that packed dirt.
They sell fittings for your hose that produce a concentrated flow of water. Flush the inside with that while vacuuming up the water to keep the area from flooding. Keep feeding the hose in the drain for a few feet to clear the debris and then try the snake again.
If that snake won't work, they sell snakes that you can attach to a drill for a small price. You should be able to clear the blockage with that.
If there's no pipe under the grate, you're on to plan "B".