Alligator Gorge sits on the eastern side of Mount Remarkable National Park in the southern Flinders Ranges, four hours north of Adelaide. The gorge is named — verify with Nukunu cultural authority — after Ally, a Nukunu shepherd whose role in early colonial exploration of the ranges was significant enough to attach his name to one of the area's major landforms. The gorge's two headline features are The Narrows — quartzite walls a few metres apart for several hundred metres, layered in red, orange and ochre — and the Terraces, a stepped series of platforms the creek runs down. Three walks share the trailhead carpark: a one-hour gorge circuit, a three-and-a-half-hour Ring Route through the gorge and the surrounding wildflower country, and a longer overnight loop connecting to Hidden Gorge. April to October is the recommended walking season; summers are hot. Park entry fee required (book online; no reception at the gorge). Nukunu name for Mount Remarkable: Wangyarra, meaning "running water." Adjacent Wapma Thura National Park was proclaimed in 2022.
Steps into the gorge are steep. Flash flooding is possible after rain so do not enter in wet weather. The gorge floor involves rock-hopping. Carry water as there is none available on the trail.