Little Sitkin is roughly circular and about in diameter. The interior is extremely rugged and mountainous; only the lower slopes are grass covered. There are two prominent peaks, one high in the northeast part of the island and the other high in the southern part. Numerous streams are on the island but no lakes or ponds. The coast is generally bold, rocky, and precipitous, with a fringe of kelp wide. Small steam jets and hot springs are in the valley at the head of William Cove on the northwest of the island.