Sandra Bullock & Ryan Reynolds Take Louis Hiking in Wyoming

That was Ryan Reynolds and Sandra Bullock's plan last weekend, as they explored Wyoming's Grand Teton National Park – with Reynolds, 34, carrying Bullock's son Louis in a hiking backpack
Bullock, 47, has a home in the Jackson Hole area and has been vacationing there with a group of friends, according to the report.

The two actors are famously close, with Bullock surprising Reynolds earlier this month on the red carpet at the Los Angeles premiere of his movie The Change-Up.

"They are like family, like a brother and sister," a source tells PEOPLE of their friendship. "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."