Where is Long?

Amphoe Long11.2 km · 7.0 mi → Den Chai25.5 km · 15.8 mi → Amphoe Den Chai27.7 km · 17.2 mi → Wang Chin30.0 km · 18.6 mi → Sung Men31.4 km · 19.5 mi → Phrae33.7 km · 21.0 mi → Nong Muang Khai41.5 km · 25.8 mi → Mueang Phrae45.3 km · 28.1 mi → Rong Kwang59.2 km · 36.8 mi → Amphoe Rong Kwang65.8 km · 40.9 mi → Song69.3 km · 43.1 mi →

Amphoe Den Chai17.91667, 100.03333 → Amphoe Long18.14262, 99.90901 → Amphoe Rong Kwang18.32614, 100.39418 → Den Chai17.98372, 100.05217 → Mueang Phrae18.12258, 100.25620 → Nong Muang Khai18.28845, 100.15231 →