Johnson Hardwood Green Mountain Series. The Green Mountain Series is a high-end, traditional solid hardwood collection made completely from legally harvested domestic wood species in North America. With lightly wire-brushed oaks this collection brings natural American beauty into your home. As a solid hardwood flooring line, these floors can withstand multiple sandings and are good for raised foundation installation. The Green Mountain Series reflects the range of timbered hillsides and flowing streams of the wild country, transforming your home into a picturesque setting.