how did great sand dunes national park form
The Great Sand Dunes National Park is open 24 hours a day, all year. Consult the official Great Sand Dunes National Park and Preserve web site for information on fees and camping reservations. There are many events from May through September including the Summer Concert Series and Junior Ranger Day.ecent scientific research suggests that the Great Sand Dunes began forming around 440,000 years ago, after a large inland lake that once covered the San Luis Valley-named Lake Alamosa when evidence of the lakebed was discovered in 2002 - dried up due to climate change.