The province is bisected by the Phetchabun mountain range, with the highest elevation in the provinc
National parks
There are a total of six national parks, of which four are in region 7 (Nakhon Ratchasima) and Nam Nao in region 11 (Phitsanulok) and Nam Phong in region 8 (Khon Kaen) of Thailand's protected areas.
Nam Nao National Park, 966 km2 (373 sq mi)[5]: 5
Sai Thong National Park, 319 km2 (123 sq mi)[5]: 77
Tat Ton National Park, 217 km2 (84 sq mi)[5]: 23
Nam Phong National Park, 197 km2 (76 sq mi)[5]: 100
Phu Laenkha National Park, 200 km2 (77 sq mi)[5]: 108
Pa Hin Ngam National Park, 100 km2 (39 sq mi)[5]: 105
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