It extends about 113 km (70 mi) from west to east.

The Wilhelminagebergte is part of the Tumucumaque Uplands of the Guiana Shield.

[2] Its best-known peaks are the Julianatop, 1280 m and the country's highest peak, and the Tafelberg, 1026 m. The area is surrounded by tropical rain forest and covered by other forests.

It is biologically very diverse, with an estimated 3,000 higher plant species.

[2] Many rivers rise in the Wilhelmina Mountains, including: the two branches of the Coppename; Saramacca; some tributaries of the Suriname; the West and East Rivers; and the Kabalebo.