Preheat your oven to 325°F (163°C). Line a large baking sheet with parchment paper.
In a large bowl, combine oats, pecans, pepitas, , almonds, sugar, salt, pumpkin pie spice, and cinnamon.
In a small saucepan or microwave-safe bowl, warm the coconut oil, maple syrup, and pumpkin purée until smooth and slightly warm. Whisk together.
Pour the wet mixture over the dry ingredients and stir until everything is evenly coated.
Spread the granola mixture evenly onto your prepared baking sheet.
Bake for 30 minutes, stirring halfway through, until golden and fragrant.
Let it cool completely — it will crisp up as it cools.
Once cooled, break into clusters and store in an airtight container for up to two weeks.