Question

A desert would most likely form on the leeward side of a mountain. would it most likely form at the top or at the bottom of the leeward side?

Answer 1

Which would be least likely to get rain as the clouds pass over the mountain? Depending on the height of the mountains, there might be some residual rain coming over the top of the mountain.

However, since this is not my area of expertise, I searched Google under the key words "<I>rainfall mountains desert</I>" to get these possible sources:

http://en.wikipedia.org/wiki/Rain_shadow

After this, I searched under "rain shadow."

http://bcs.whfreeman.com/thelifewire/content/chp56/5602001.html
http://www.weatherpages.com/rainshadow/
http://animals.about.com/od/alpinemontaine/f/rainshadow.htm
http://pubs.usgs.gov/gip/deserts/types/
http://www.windows.ucar.edu/tour/link=/earth/Atmosphere/precipitation/rain_shadow.html

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.

I hope this helps. Thanks for asking.