Preheat oven to 300° F. Line a large baking sheet with parchment paper or a silicone baking mat.
In a large bowl, combine oats, almonds, cinnamon, and flax seeds and stir. Set aside.
In a medium bowl, whisk together the maple syrup, coconut oil, and vanilla extract. Pour the mixture over the dry ingredients and stir thoroughly to combine.
Spread the granola onto the prepared baking sheet. Bake for 45 minutes, stirring halfway through. Let cool completely before serving or storing. Store granola in an airtight container at room temperature for up to three weeks.