Development pressure in the Martis Valley, just north of Lake Tahoe, is as great as anywhere in the high Sierra. Straddling the Placer and Nevada county line about 20 miles southwest of Reno, the area appears to be evolving into a high-end resort destination. Several thousand homes and vacation units are proposed in unincorporated Placer County and the Town of Truckee, as are at least half a dozen golf courses.