Volunteers and officials from the park as well as the Provincial Administrative Organisation, cleaned up the Sri Than tourist service centre at the foot of Phu Kradueng mountain in Loei's Phu Kraduent district.
They cleaned the building, the public grounds and shops that have not been used for months since the end of the last camping season.
The Loei governor will chair a ceremony to open the Phu Kradueng camp site at 8am on Monday.
On Tuesday, senior officials of government agencies and state enterprise offices in Loei will watch the rising sun together atop the mountain before attending a meeting at the site.