In Golden Sun
At the time of Golden Sun and The Lost Age, the Goma Range is a single line of mountains that divides the western plains region of the continent from the central and northern plains regions.The mountains can be crossed underneath by traveling through Goma Cave, a cavernous pathway that allows passage between towns like Vault and Lunpa and the town Bilibin deeper in Angara. Goma Cave is the primary feature Goma Range is known for.
In Golden Sun: Dark Dawn
In Golden Sun: Dark Dawn, the Golden Sun event dramatically changes the landscape of Angara. The western plains are now rocky highlands , while the Goma Range has extended to cover much of the area. There are only two known passages through the range to other parts of Angara: a bridge at Carver's Camp and an underground cave at the Konpa Ruins, which splits into two entrances, north to Bilibin and south to Ei-Jei.