The Sinai peninsula is 60,000 square kilometers (23,000 square miles), but the Israelites did not journey through all of it (they were never in the Western Sinai). On the other hand, they also passed through the wildernesses of Ammon and Moab (Jordanian desert) and east of Edom (Deuteronomy ch.2). See also:
The area of Pepperbox Wilderness Area is 91.297 square kilometers.
The area of Siffleur Wilderness Area is 412.14 square kilometers.
Frank Church - River of no Return Wilderness Area.Gospel Hump Wilderness Area.Hells Canyon Wilderness Area.Sawtooth Wilderness Area.Selway-Bitterroot Wilderness Area.
Upon exiting Egypt the Israelites traveled to Mt. Sinai, which the bible informs is in nothern Arabia, most likely in the eastern part of the land of Median, the country of Moses' father in law. From there they travel to the area around the Jordan River. Here they failed in faith and for forty years they wandered in the wilderness until God brought the remnant back to the promised land.
The area of Emigrant Wilderness is 454.369 square kilometers.
The area of Havasu Wilderness is 72.038 square kilometers.
The area of Sylvania Wilderness is 74.167 square kilometers.
The area of Innoko Wilderness is 5,018.102 square kilometers.
The area of Clearwater Wilderness is 57.433 square kilometers.
The area of Raggeds Wilderness is 263.013 square kilometers.
The area of Chamisso Wilderness is 1,841,319.672192 square meters.
The area of Galiuro Wilderness is 308.844 square kilometers.