Sandra Bullock and Ryan Reynolds have previously denied being a couple when he spent time visiting his costar from The Proposal at her Texas home shortly after his divorce to actress Scarlett Johansson had been announced.

Now they’ve been spotted together again, in an out-of-the-prying-paparazzi-way locale: Wyoming.

The good pals are hanging tight in Jackson Hole, WY and have been photographed hiking at Grand Teton National Park.

Reynolds, 34, was carrying Sandra’s son, Louis Bardo, in a baby backpack as they hiked through the wilderness and enjoyed the outdoors with a group of friends.

Even though they are together, they aren’t together together, insist pals of the stars.

“They are like family, like a brother and sister,” a source tells PEOPLE. “It’s not a love affair. They’ve been friends for over 10 years, and they care for each other deeply. They support each other and have a lot of fun together.”

Check out all the photos at TMZ.com.

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