Preheat the oven to 350 degrees. Prepare two loaf pans with cooking spray or butter and flour.
In a large bowl, combine the flour, salt, and baking soda together. Set aside.
In a second large bowl, combine the pumpkin, sugar, eggs, oil, and cinnamon with an electric mixer on medium-low speed until smooth.
Add the dry ingredient mixture little by little until a thick batter has formed.
Divide the batter equally and pour the two prepared loaf pans.
Bake 45-60 minutes, until a toothpick inserted in the center comes out clean.