This is a large snake with an average length of 0.7 to 1.3 meters and a maximum length of 1.7 meters. The head is rather long, triangular, slightly distinct from neck, with large, conspicuous nostrils on side of snout. The Fangs are large and the tail short. The ground color may be dark brown, brownish-yellow,, or brownish-gray. Immature specimens are usually clear orange to brownish-orange. Dorsal pattern consists of black or brown oval spots edged with black, white, or both. Spots in middle row may fuse together to form zig-zag pattern. Two rows of oval spots run along each side of body. The tail is striped. Belly pinkish-brown or whitish with black spots; becoming darker towards tail. Three separate semi triangular spots on top of head are situated to form triangle with vertex between eyes. A dark band runs diagonally from eye to corner of mouth.
Head longer than broad, distinct from neck, body stout, dorsoventrally flattened; nostril large in a crescent-shaped, large nasal scale; the supraocular scale not divided; 11-12 supralabials separated from eye by 3-4 rows of small scales; 13-15 infralabials; anterior genial short, wide, posterior not differentiated; dorsals strongly keeled in 27-33 rows at midbody; ventrals 164-178, subcaudals 46-58, anal entire.
Dorsum light yellowish brown to sandy, with a median series of 22 to 32, large, oval, chestnut blotches, bordered with black or dark brown, narrowly edged with cream, arranged longitudinally, mostly fused with each other to form a mid dorsal chain. A lateral series of similar but smaller spots, which on lower side are with scattered dark flecks with lighter edges. A pair of dark spots at the base of head. A light V-shaped canthal mark with apex on the snout. Labials mottled with brown and cream, ventrum pinkish white with curved dark spots. Throat white.
Snout-vent length 1025-1080 mm, tail 212-225 mm.