🔄 Updated 21 Jun 2026
This route suits anyone with their own car or a rental, because spots like Bueng Boraphet and Pa Sak Jolasid Dam sit outside town and are awkward to reach by public transport. If you only want Lopburi's old town, though, the historic sites are all within walking distance — hop off the train and you can cover them on foot. The main route is dead simple: take Highway 1 from Nakhon Sawan, then turn onto Highway 11 around the Tak Fa–Khok Samrong stretch into Lopburi town. The drive runs through flat plains and rice fields, easy going, with gas stations and roadside coffee stops along the way.
Route overview and how to plan your days
The idea behind the plan is to use Nakhon Sawan as your starting point, knocking out Pak Nam Pho and Bueng Boraphet first since the highlights are scattered around the city. Once those are done, you shift down to Lopburi, the historical highlight of the trip. Lopburi's old-town sites are clustered close together and walkable, so you can cover them comfortably in a single day. That leaves the last day open for Pa Sak Jolasid Dam, or the sunflower fields if you come in the cool season. The driving legs between stages aren't long — the longest drive is the day you move from Nakhon Sawan down to Lopburi.
- Day 1 — Pak Nam Pho, the Pasan landmark at the source of the Chao Phraya, then Bueng Boraphet in the afternoon, overnight in Nakhon Sawan
- Day 2 — drive down to Lopburi in the morning, walk the old town: Phra Prang Sam Yot, San Phra Kan, King Narai's Palace, overnight in Lopburi
- Day 3 — Pa Sak Jolasid Dam or the sunflower fields (cool season) before heading home
Rough distances
Nakhon Sawan to Lopburi is about 130 km on Highway 1 (Phahonyothin) via Tak Fa, around 2 hours. From Lopburi town to Pa Sak Jolasid Dam (Phatthana Nikhom district) is roughly 50 km — budget half a day there and back.
Book the activities in your Nakhon Sawan trip ahead
Booking online ahead on Klook or GetYourGuide is usually cheaper than the gate and skips the queue. Pick only the experiences you actually want — prices and availability are shown live on each site.
Day 1 — Pak Nam Pho + Bueng Boraphet
Source of the Chao Phraya, then out to Thailand's biggest lake
Bird-watching season at Bueng Boraphet
November to February is migratory-bird season. Come at dawn or in the evening to catch the most waterbirds. If you're serious about birding, swap in a boat trip on the morning of Day 1 instead.
Day 2 — Down to Lopburi, walking the monkey old town
This is the highlight of the trip. Drive from Nakhon Sawan down to Lopburi in the morning, then walk the cluster of historic sites in the town center, which are close enough to cover on foot. Lopburi is a town where crab-eating macaques really do live right in the center, especially around Phra Prang Sam Yot and San Phra Kan. It's part of the town's charm, but you'll want to keep a bit of an eye on whatever's in your hands and your bag.
Khmer-to-Ayutthaya history downtown, plus the resident monkeys
Mind the monkeys a little
Around Phra Prang Sam Yot and San Phra Kan the monkeys are plentiful and used to people. Don't carry food bags, drinks, or loose glasses or hats in your hands. Tuck valuables into a zipped bag and you'll have a fun visit with no drama.
Day 3 — Pa Sak Dam or the sunflower fields
Pick the last day to suit the season. If you come in the cool season (November to February), the Phatthana Nikhom district has big sunflower fields in bloom. Out of season, head to Pa Sak Jolasid Dam, a large earthfill reservoir whose floating railway over the water at Khok Salung is a highlight. Both spots are out toward Phatthana Nikhom district, not far from Lopburi town.
Closing the trip with the dam's natural side
Where to base yourself
This plan has you sleeping 2 nights. We'd suggest the first night in Nakhon Sawan around Pak Nam Pho — a big town with plenty of hotels and food, close to Bueng Boraphet. For the second night, stay in Lopburi town: pick the old-town area to walk to the historic sites easily, or the train-station area, which has hotels and a market nearby.
Stay in Pak Nam Pho, Nakhon Sawan (Night 1)
City center, lots of restaurants, close to Bueng Boraphet and Pasan — easy to get out and about
Stay in Lopburi old town (Night 2)
Walk to Phra Prang Sam Yot, San Phra Kan and King Narai's Palace — sightsee in the morning without driving
Eats you shouldn't miss along the way
Pak Nam Pho clown knifefish-ball noodles
A Nakhon Sawan signature — bouncy, freshly made clown knifefish balls. The famous shops around Pak Nam Pho have been open for decades, and some also do tod mun and fried snacks. Good for breakfast or lunch before you head out.
Lopburi tom yum noodles
Lopburi's signature dish — a punchy, sour-and-spicy tom yum broth with pork or mixed seafood. Several long-running shops sit in the old-town area, making it a lunch that pairs well with walking the historic sites.
Lopburi plain noodle soup
A clear, well-rounded noodle soup with a choice of pork or beef and various noodle types. Some shops also do steak at night. This is where Lopburi locals actually eat.
River prawns and river fish by the water in Lopburi
Riverside restaurants outside Lopburi serve fresh river prawns and river fish. Try grilled prawns or salt-crusted grilled snakehead — a long, lingering dinner soaking up the riverside mood.
Pak Nam Pho congee and rice soup
Pak Nam Pho is a Chinese-community area, so breakfast staples like minced-pork congee and rice soup are easy to find all over the neighborhood. Ideal for a morning meal before heading to Bueng Boraphet.
Freshwater fish by Pa Sak Dam
Around Pa Sak Jolasid Dam, local restaurants cook freshwater fish straight from the reservoir. Try grilled fish or tom yum fish — a lunch that pairs nicely with the dam views.
Nakhon Sawan riverside market
Evening and night eats from riverside stalls, from made-to-order dishes to rad na, fried oysters and desserts. Easy on the wallet.
Tips to make the trip smoother
- King Narai's Palace closes Mon–Tue — schedule Day 2 to land on Wed–Sun if you mean to go in, and always check the day beforehand
- Mind the monkeys in Lopburi — don't carry food bags or loose items around Phra Prang Sam Yot and San Phra Kan
- Sunflower season, Nov–Feb — come now and you get both the sunflower fields and migratory-bird season at Bueng Boraphet, the best fit overall
- Start early — both Bueng Boraphet and Lopburi's old town are cooler in the morning and less crowded
Check out the full Nakhon Sawan travel guide to make trip planning easier
See the Nakhon Sawan guide →