President Barack Obama spent day four of his luxurious two-week vacation in Hawaii hiking with family and friends and did not got unnoticed.

Unassuming hikers were delighted to see the President and First Lady Michelle Obama walking the Koko Head on Oahu's southeastern side with friends on Tuesday.

The Obamas arrived for the hike just before 10am after the President took an early morning trip to Marine Corps Base Hawaii in Kaneohe to exercise at a gym.

On Monday, the president went the golf course after a morning workout and some time spent at his vacation home in Kailua.

Hop in: The personal hot tub connected to the pool is perfect for the POTUS and his family should they wish to unwind after a challenging day of hiking trails and playing golf