After pickup from your centrally located hotel in Hanoi, board a minibus for the 1.5-hour drive to Hoa Binh, a mountainous province in northern Vietnam. You'll travel with a small group no larger than 15 participants, meaning that you can enjoy a safer and more personalized service with your guide. Anyone with a moderate fitness level who can ride a bicycle may enjoy this full-day excursion; a support vehicle follows. On arrival, snap on your helmet and climb on your mountain bike for a ride through green rice fields, following hillside paths belonging to a limestone mountain. You'll pedal about 1.3 miles (2 km) uphill, then roughly the same distance downhill, before heading up a single dirt road through 11 miles (18 km) of rock gardens and trails. Afterward, stop at an eatery where lunch will be served. Following lunch, you'll meet up with the minibus for the drive back to Hanoi with drop-off at your hotel.