An outdoor mounting assembly for a light fixture includes a post having a hollow cylindrical body section with an upper end and a lower end. A cap is connected to the post. The cap includes a cylindrical body having an upper end with a first opening and a second opening extending non-parallel to the first opening. The second opening aligns with a third opening in the post. A tamper resistant fastener is configured to extend through the second opening and the third opening and engage a light fixture connected to the cap to resist removal of the light fixture from the cap.