Chiang Mai to Phayao Drive: Scenic Route Guide

Leaving Chiang Mai's Ping River basin, Route 118 climbs into the Phi Pan Nam Range, reaching 1,200 meters at the Doi Saket pass before descending into the Kok River valley. This road was originally a logging track, upgraded in the 1970s to military supply route, and now serves as the main artery to Phayao's lake region. The 190-kilometer journey takes about three hours by car, with the fastest typical time being 2 hours 45 minutes.

The route traverses three distinct ecosystems: lowland rice paddies, misty pine forests, and dry dipterocarp woodlands. At km 52, watch for Huai Nam Dang National Park signpost, a 20-km detour to a famous sea of fog viewpoint. The area's unique geology features granite outcrops formed 200 million years ago, visible near the Mae Kaduan waterfall.

Local commerce thrives around Phayao Lake – the largest freshwater lake in northern Thailand, covering 22,000 hectares. The lake supports a fishing industry, with over 30 fish species, and is surrounded by koi farms and macadamia nut orchards. Stop at the Phayao Fresh Market to sample local products.

Two UNESCO-tentative sites are near the route: the ancient city of Wiang Nong Lom (late 11th century) and the Thaton Cliff paintings (2,000 years old). Both are off the main road but signposted.

Route 118 is a well-maintained two-lane highway with occasional passing lanes. Fuel stations are available at Mae Kachan (km 40), Wiang Pa Pao (km 70), and just before Phayayao city. Expect diesel prices around 32 baht/liter and gasoline around 36 baht/liter as of 2025. Toll-free entire route, but be aware of slow-moving trucks on inclines.

For planning, consider how to find the best stops and hidden gems between cities. It offers practical advice on spotting turnoffs and local haunts. Key logistics: restrooms at petrol stations, 7-Elevens at Wiang Pa Pao and Ban Thung Hong.

Road quality is good, but curves are sharp in the mountain section. Watch for rockslides during heavy rains (May–October). Use low gears on descents. There are no toll gates, but police checkpoints near Ban Thung Hong often slow traffic. For family suitability, consider stops at Huai Mae Sai Waterfall (easy 100-meter walk) and the Phayao Lake promenade, which has a playground and pedal boats. Many restaurants offer playgrounds.

Pet-friendly travelers can find numerous roadside cafes with outdoor seating that welcome dogs, such as 'Khao Lom Cafe' (not a chain, but generally accommodating). Always carry water and a bowl. For fatigue management, plan rest stops every 1.5 hours; the Doi Saket viewpoints and the Phayao lakefront are ideal. The route has 12 designated rest areas, including one with a sculpture garden at km 88.