Bicycle Built for Two
Take a tandem cruise down by the San Francisco Bay—it's eight miles from Fisherman's Wharf to the Presidio and across the Golden Gate Bridge to Sausalito. After a lunch by the water, jump on the ferry to get back to your starting point.
Calories burned: 400
Blazing Saddles Bike Rentals, 415/202-8888; $11 per hour.
Be your own guide as you pedal along the Chesapeake & Ohio Canal bike trail, which stretches 185 miles through the scenic Potomac River valley from Washington, D.C., to Cumberland, Maryland.
Calories burned: 9,000
Chesapeake & Ohio Canal National Historical Park, Washington, D.C.; 202/653-5190; www.nps.gov/choh.
Break a sweat mountain biking 130 miles of Idaho backcountry between Sun Valley and the Sawtooth Wilderness Area, unwinding each evening with a long soak in a natural hot spring and a tasty dinner prepared by your guide.
Calories burned: 6,400
Western Spirit Mountain Bike Adventures, 800/845-2453; www.westernspirit.com; five-day tours from $895.
Moab's famous 12-mile Slickrock Trail lets unicycles show off their tough side. With a rugged frame and big knobby wheel, the boulder-chomping Semcycle Deluxe Off-Road is machine enough to conquer even the gnarliest terrain.
Calories burned: 1,200
Available at Unicycle.com, 800/ 864-2925; www.unicycle.com; $690.
Sign up for a low-speed bike tour of Europe. This month, Butterfield & Robinson has trips in France and Italy. As you meander through scenery that inspired the old masters, you'll stop for wine tastings, château tours, and elaborate meals.
Calories burned: Don't count on it.
Butterfield & Robinson, 800/678-1147; www.butterfield.com; five-day packages from $2,475.
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