A good network of clearly marked circular forest trails begins near the park headquarters, ranging from a 1km nature trail teeming with butterflies to a 6km track known for occasional elephant sightings; another 3.5km trail climbs through mixed deciduous forest to the Phu Kor outlook, with its sweeping views across to Phu Phajit.

Other trails can be accessed directly from Highway 12, most of them clearly signposted from the road: at kilometre-stone 39, a steep climb up 260 roughly hewn steps leads to the Tham Pha Hong viewpoint, a rocky outcrop offering stunning panoramas of the park; at kilometre-stone 49, there’s a 4km nature trail taking in Suan Son Dang Bak viewpoint; and at kilometre-stone 67, a 700m trail leads to the beautiful Haew Sai waterfall, best seen during or immediately after the rainy season. Experienced hikers can reach the top of Phu Phajit along a rugged trail which begins from kilometre-stone 69; you need to hire a guide from the visitor centre (best booked in advance) for the steep six-hour climb.

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