Kourtney Kardashian, son Reign explore Yellowstone

BIG SKY, Mont., Sept. 25 (UPI) -- Kourtney Kardashian and son Reign Disick explored Yellowstone National Park this week.

The 36-year-old reality star treated fans to a new photo of the 9-month-old infant during a visit to Lone Mountain Ranch. The upscale lodging facility is located between Yellowstone National Park and Big Sky Resort in Big Sky, Mont.

"Yellowstone National Park #lonemountainranch #justcallmedavycrockett," she captioned a picture of herself and Reign overlooking grazing buffalo on Instagram.

Reign is Kardashian's youngest child with ex-partner Scott Disick. The couple broke up in July after Disick was photographed with his ex-girlfriend, Chloe Bartoli, and Kardashian appeared to reference the split this week on Twitter.

"Being alone & actually sitting with our own thoughts can lead to such growth and realizations that are rare in our everyday busy lives," she wrote Tuesday.

Kourtney Kardashian and son Reign Disick at Yellowstone National Park this week. Instagram/Kourtney Kardashian

Kardashian and Disick also share 5-year-old son Mason and 3-year-old daughter Penelope. The reality star recently returned on E! series Keeping Up with the Kardashians, which previewed Kardashian's reaction to the Bartoli photos this week.