Phu Ang So

Phu Ang So is a sandstone hill about 20 kilometres from Waritchaphum district town in Sakon Nakhon, known locally by its temple name Wat Phu Ang So Thephkiri. There’s no ticket booth, no gate, and no official opening hours — visitors treat it as open roughly 08:00-17:00, same as most unstaffed hill sites in the Phu Phan range.

The draw is modest and specific: a short, rocky ascent — around 200 metres of climbing by most local accounts — leads to a hilltop shrine and a clearing used for camping. Sakon Nakhon locals rate the cool-season scenery here as close to Phu Kradueng’s, without Phu Kradueng’s crowds or entry fee. Terrain is dry deciduous and mixed dipterocarp forest typical of the wider Phu Phan mountains, with sandstone outcrops exposed along the trail. This is a working local site rather than a developed tourist attraction — don’t expect signage, marked trailheads, or English-language information anywhere on the hill.

Insider Tip: Arrange a local guide or ask at the Waritchaphum district office before heading out. The access road isn’t consistently signposted, and online maps place the trailhead inconsistently — a five-minute conversation with someone from town saves an hour of driving in circles.

November through February is the only season worth the trip. Cool, dry air makes the climb manageable and the camping comfortable; outside that window the forest is either too hot for a midday ascent or too wet underfoot for the rocky sections. Groups pitch tents overnight on weekends during cool season, but there’s no infrastructure to support them — no toilets, no water source, and no vendors at the base or the summit.

Watch out: Bring everything you need. There’s no shop, restaurant, or reliable phone signal on the hill, and the nearest convenience stop is back in Waritchaphum town, not at the trailhead.

Phu Ang So suits a specific traveller: someone already in Sakon Nakhon’s rural west, comfortable with unmarked trails and no facilities, looking for a genuine local camping spot rather than a polished national-park experience. It’s less of a fit for a quick day-trip from Sakon Nakhon city, given the drive and the lack of any five-minute photo stop near a car park — the reward here is the climb and the overnight stay, not a quick look.