The Camp Nelson National Monument Passport Stamp can be obtained on the front porch of the Visitor Center. The month will be correct (changed each month) but the date is left blank to be filled in by you.
NPS
The visitor center is open 7-days a week starting on Memorial Day (May 30, 2022) through Labor Day (September 5, 2022). If you are interested in a passport stamp for Camp Nelson National Monument and are visiting when operating hours revert to Wednesday-Sunday, pre-stamped pieces of paper with the month and year are available in a box located on the front porch of the visitor center. An interpretive trail guide is also available on the same porch.