Mountainous

Mountainous is a Better Spawner Category that contains by default the following biomes:

Vanilla Biomes

Biome	Biome ID
Gravelly Mountains	minecraft:gravelly_mountains
Gravelly Mountains+	minecraft:modified_gravelly_mountains
Mountain Edge	minecraft:mountain_edge
Mountains	minecraft:mountains
Wooded Mountains	minecraft:wooded_mountains

Biomes O' Plenty Biomes

Biome	Biome ID
Alps	biomesoplenty:alps
Alps Foothills	biomesoplenty:alps_foothills
Highland	biomesoplenty:highland
Highland Crag	biomesoplenty:highland_crag
Highland Moor	biomesoplenty:highland_moor
Jade Cliffs	biomeoplenty:jade_cliffs

Biomes You'll Go Biomes

Biome	Biome ID
Alpine Foothills	byg:alpine_foothills
Alps	byg:alps