The tourist office provides pamphlets describing the best walking tours in the region. The £2 pamphlet Walks Around Peebles describes 20 walks, including one along the Tweed. The Tweed Walk begins in the center of Peebles, and -- with the twists and turns described in the pamphlet -- takes you downstream along the river, then upstream along the opposite bank for a return to Peebles. You can follow the path for segments of 4km (2 1/2 miles), 7km (4 1/3 miles), or 12km (7 1/2 miles). Regardless of the length of your walk, you'll pass the stalwart walls of Neidpath Castle.
Glentress Bicycle Trekking Centre, Glentress, Peebles (tel. 01721/721-736), is the place to rent a bike. You'll have to leave a refundable deposit of £60. Daily rates range from £15 for a half-day to £20 for a full day, and rentals must be arranged in advance. It's open daily April to October 9am to 7pm (Sat-Sun from 10am); November, Wednesday noon to 10pm and Saturday and Sunday 10am to 5pm.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.