Minecraft wiki entry for Speedrun, associated text: Remember that a saddle is very valuable? The fastest way to hunt endermen is riding a horse in the desert or savannah. Endermen won't spawn in the rain and therefore the lack of rain in the desert and savannah biomes is helpful. These biomes are also usually flat which makes it much easier to spot them. You can quickly ride far enough to reset the spawn, meaning you will have many more chances for endermen to spawn, riding in a large circle around the biome.