Wild Weasel Simulations has released free 10m terrain mesh for the conterminous United States (lower 48 states). Broken up into eight different areas, and you can install all, or just the regions you'd like. Works with P3D and FSX. Feedback is welcome!
Read more at http://victoryinstitute.net/wildweasels/
Read more at http://victoryinstitute.net/wildweasels/