Here is a suggested 12-day itinerary for a cycling tour in Thailand:
Day 1: Arrive in Bangkok
Spend the day exploring the bustling city of Bangkok and getting acclimated to the culture.
Day 2: Bangkok to Ayutthaya (76 km)
Head out of Bangkok towards the ancient city of Ayutthaya, a UNESCO World Heritage Site. Along the way, stop at local markets and temples.
Day 3: Ayutthaya to Lopburi (52 km)
Cycle through rice fields and small villages to the charming town of Lopburi, known for its many monkeys.
Day 4: Lopburi to Khao Yai National Park (66 km)
Take a scenic route through the countryside to Thailand’s first national park, Khao Yai. Stay overnight in one of the park’s guesthouses.
Day 5: Khao Yai National Park to Nakhon Ratchasima (46 km)
Cycle through the park and stop at the Khao Yai winery for a wine tasting, then head to the urban center of Nakhon Ratchasima.
Day 6: Nakhon Ratchasima to Phimai (66 km)
Cycle to the ancient Khmer temple of Phimai, which dates back to the 11th century.
Day 7: Phimai to Buriram (63 km)
Visit the silk-weaving village of Ban Khok Kong and cycle through rural villages to Buriram.
Day 8: Buriram to Surin (75 km)
Cycle through sugar cane fields and visit the Surin Elephant Festival, where elephants are celebrated with a parade and cultural performances.
Day 9: Surin to Ubon Ratchathani (93 km)
Cycle through scenic routes and rural villages to the lively city of Ubon Ratchathani.
Day 10: Ubon Ratchathani to Khong Chiam (76 km)
Cycle along the Mekong River to the small town of Khong Chiam, famous for its scenic viewpoint overlooking the river.
Day 11: Khong Chiam to Ubon Ratchathani (75 km)
Cycle back to Ubon Ratchathani, stopping at waterfalls and local markets along the way.
Day 12: Depart from Ubon Ratchathani
Pack up your bikes and head home or to your next destination.
Of course, this itinerary can be personalized to fit your preferences and level of fitness. Keep in mind that the best time to visit Thailand for a cycling tour is from November to February, when the weather is cooler and drier.