If you're feeling energetic, or just looking to work off an excess of fondue dipping, Interlaken offers many opportunities for sports -- sailing, windsurfing, rowing, fishing, golf, tennis, mountain trekking, and glider flying. There's also a swimming pool in town. More information is available at the tourist office.
Golf -- You can play at the Interlaken-Unterseen course (tel. 033/823-60-16) from April to October. The cost is 100F ($82/£43) Monday to Friday and 120F ($98/£51) Saturday and Sunday. With a Visitor's Card, the cost is reduced to 90F ($74/£39) on weekdays and 110F ($90/£46) on weekends.
Horseback Riding -- There are several bridle paths between Lake Thun and Lake Brienz. The Voegeli Riding School, Scheidgasse 66, in Unterseen (tel. 033/822-74-16), offers 1-hour riding lessons for 50F ($41/£21).
Swimming -- There's a public indoor pool and a public open-air pool, Bödeli (tel. 033/827-90-90), behind the Kursaal. The indoor pool has a sauna and a solarium as well as a fitness room. This pool is open year-round Monday from 9am to 9pm, Tuesday through Friday from 9am to 9:45pm, and Saturday and Sunday from 9am to 6pm. Entrance is 8F ($6.55/£3.40) for adults, 4.80F ($3.95/£2.05) for children 6 to 16, and free for children 5 and under. The outdoor pool, with its changing cabins and 9.9m (32-ft.) diving board, is open mid-May through September daily from 9am to 7pm. Keep in mind, though, that even July and August might be too chilly for you. Entrance is 6.50F ($5.35/£2.80) for adults and 4.50F ($3.70/£1.90) for children.
Tennis -- Use of a court at the Höhematte costs 25F ($21/£11) per hour for visitors. If you're alone and willing to be matched up with another person, it will cost you half the court fee. For reservations, phone tel. 033/822-14-72. The courts are open from mid-April to mid-October daily from 8am to 8 or 9pm.