[2][3] Megophrys montana is a relatively large frog: males can reach 92 mm (3.6 in) in snout-vent length and females 111 mm (4.4 in).

As their common name suggests, these frogs have "horns": their upper eyelids have horn-like elongations.

[3] Known with certainty only from Java and possibly from western Sumatra, Indonesia.

Records of Megophrys montana outside this range (from Thailand southeast to Sumatra, Natuna Islands, Borneo, and the Philippines) apply to related named and unnamed species.

[1] These frogs are relatively clumsy and rely on camouflage for defense.