Preheat the oven to 325 ºF (165 degrees C).
Add oats, nuts, seeds, and coconut to a mixing bowl. Keep the raisins set aside.
On the stovetop, add peanut butter, water, maple syrup, and vanilla to pan. Stir over low-medium heat for ~2-3 minutes, until all ingredients are well combined.
Pour wet ingredients on the dry ingredients in the mixing bowl. Stir until thoroughly combined.
Pour granola onto a baking sheet lined with parchment paper and press down with a large spoon or a spatula to create a uniform layer.
Bake for 23 minutes. The granola, including some of the coconut pieces, will have a light golden-brown hue and appear dryer than it did prior to baking.
Remove granola from the oven and add raisins on top.
Once mostly cool, break apart granola with a spatula and/or your hands.
Once completely cool, store in an airtight, glass container in a cool dry place like a cupboard or pantry. Good for ~4 weeks.