Preheat your oven to 350°F (175°C). Grease a loaf pan.
In a large bowl, mix the grated squash, sugar, oil, eggs, and vanilla until well combined.
In another bowl, whisk together the flour, baking soda, baking powder, salt, and cinnamon.
Gradually add the dry ingredients to the wet ingredients, stirring until just combined.
Pour the batter into the prepared loaf pan.
Bake for 60 minutes, or until a toothpick inserted into the center comes out clean.
Let the bread cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.