Samut Songkhram to Samut Sakhon: Essential Driving Guide

Directly north of Samut Songkhram, Route 35 (Thanon Phet Kasem) runs 62 kilometers to Samut Sakhon, a drive that typically takes 1 hour and 15 minutes without traffic. This route closely follows the Tha Chin River, and its flat, low-lying terrain is part of the Chao Phraya River delta, which maxes out at just 2 meters above sea level.

Driving here is as much about the journey as the destination. The route passes through one of Thailand’s most productive coastal plains, where the landscape transitions from dense mangrove forests to expansive salt farms and shrimp ponds. It’s these working lands that make the area distinct from the tourist-clogged highways of the south.

For a broader perspective on uncovering hidden gems along any drive, see this how to find the best stops and hidden gems between cities guide.

The highway is flat and straight, which can induce drowsiness; plan for a break every 30 minutes. At the 30-kilometer mark, the Chai Mongkol Rest Stop offers shaded picnic areas and clean restrooms. For families, the Suan Phung Children’s Playground just past Ban Laem is a safe spot to stretch legs. Dogs are welcome at the outdoor seating of most seafood restaurants, but keep them on a leash. If driving at night, watch for unlit farm vehicles crossing the road.

When fatigue sets in, turn off the AC and open windows—salt-laden air is reviving. The rest stop at Phanthai Norasing has motorcycle-mounted patrols and a basic first-aid station. For a unique hidden stop, exit at Wat Khao Yoi (kilometer 45) to see the 300-step staircase leading to a cave temple.

Route 35 is a well-maintained four-lane highway with a median, bypassing most urban areas. However, be prepared for several toll gates between the two provinces; a full drive costs 95 THB (about $2.70). Fuel is readily available, with PTT and Bangchak stations cropping up every 5-10 kilometers, especially near the Mahachai junction. Diesel prices average 33 THB/liter, so a small car will spend roughly 200 THB on fuel for the round trip.

• Total toll: 95 THB
• Fuel cost for round trip: ~200 THB
• Road quality: Good, four-lane divided highway

As you leave Samut Songkhram, look for the salt pans alongside the road—they’ve been operating for over a century and supply much of Thailand’s cooking salt. During the dry season (December to April), the evaporation pools create a mosaic of whites and pinks. Further north, around Ban Laem, the roadside is dotted with seafood restaurants that double as crab-shipping points.

While no UNESCO World Heritage Sites are on this stretch, the forest temples of Wat Khao Yoi and Wat Ban Laem offer a taste of local monkhood traditions. For commerce, the Mahachai Fish Market (just before Samut Sakhon) is a wholesale hub where you can watch the morning catch being auctioned. This market also reflects the region’s role as Thailand’s leading producer of dogfish and silver perch.