The 4,836-square-foot building will have space for classrooms, exhibits and meetings, county officials said.
The approximately $1.9 million project was funded by a $750,000 Texas Parks & Wildlife Department grant and voter-approved park bonds, officials said.
The center is expected to open in the fall.
“We don’t have a state park in Williamson County, and our goal with this park is to make it a state park feel,” Precinct 2 Commissioner Cynthia Long said.
River Ranch County Park is a 1,354-acre park dedicated to passive recreational activities, said Russell Fishbeck, the county's senior director of parks and recreation. It is located in the Texas Hill County between Leander and Liberty Hill off Bagdad Road at CR 278.
The park will offer 10-12 miles of hiking, biking and equestrian trails, as well as 25 spots for RV camping and 50 spots for tent camping of various kinds, Fishbeck said.
River Ranch broke ground in December 2018 and is anticipated to open this summer.