[ a long and winding... ]

The road and driveway are approximately three miles long, and should probably be better explained as separate cases.
The two and a half mile road was originally a logging access & United States Forest Service 'ghost road', and crosses through both USFS and private property; to put it bluntly, it meanders along the ridge line and climbs somewhere in the neighborhood of 1000 feet.
Although the road touches USFS lands and is occasionally patrolled by them, improving and maintaining it has fallen on us. The vast bulk is done; over the years, we've spent hundreds of thousands of dollars, used over 300 pounds of dynamite, bulldozers, trackhoes, installed ditching, culverts, water breaks and gravel. Although it can navigated using a two-wheel drive vehicle with decent clearance [closed course, professional driver, do not attempt], an all wheel drive vehicle is better and a four wheel drive is optimum, particularly during the winter months. Our vehicles of choice are made by the lovely people at Jeep.
Three other things should be noted about the road. First, the deed for the property comes complete with a 30 foot centerline easement, including improvement rights, through all property leading to the main entrance. Second, annual winterization and maintenance are a must, and we have a firm we recommend highly as they both built and maintain it. Finally, the road is now an official county road; the dome's address is 2497 High Knob Road -- although you won't be seeing the mailman. Ever. Promise. Not even Domino's will deliver here.
As an anticlimax, the driveway is just that -- a driveway that happens to be a half of a mile long or so with a lockable cattle gate. The driveway is fairly smooth and requires a minimum of maintenance aside from an annual light grading and ditch clearance.