Start in Mendham, NJ and take Co rte. 510 into Chester. Once you get to Chester, take Co route 513 south to 31 south to Clinton Twp/Annandale, then jump on US 22 E or I 78E (for about 7 or 8 miles) then go north onto Oldwick Rd/ Co rte 523. Co rte 523 turns into Co Rte 517, continue north until you get to co rte 512, make a right and follow 512 eastbound through Peapack-Gladstone, NJ and follow until you reach US 202N, take 202N through Bernardsville, NJ and make a left onto Tempe Wick Rd., Tempe Wick Rd will take you right back into Mendham, NJ/ County Route 510
Whether you like quaint little towns, rolling countryside and horse farms, or tree-lined back roads this is a great route on a bike
Relatively flat, but rolling, has some good twisties in some places and enough "open it up" straight-aways to keep you engaged the whole time. Road quality is good, no potholes, nicely paved.
In some spots there's nothing for awhile, but plenty of chain restaurants in the Annandale/Clinton Township stretch along US 22/I 78E. Mendham, Chester, Peapack and Bernardsville all have lots of little restaurants (but warning--they tend to the pricey side).
Motorcycle Road Additional info
This routes takes you past a bunch of national, and state parks, places like Morristown National Park/Jockey Hollow, Natirar, and a bunch of other Nature preserves and preserved farmlands, make this a very scenic tour.