That looks like a Japanese black pine, but also could be a monterey pine. Here is a link to a good pine ID key. You'll need to read it carefully and count the needles and pay close attention to the sheath that holds the needles. By process of elimination you can find your tree's id.

http://arnoldia.arboretum.harvard.edu/pdf/articles/1951-11--simple-key-to-the-pines.pdf