Red Top Valley Ditch (5GA.2773) was determined eligible for inclusion in the National Register of Historic Places (NRHP) in 2007. Completed circa 1903, the ditch was found to be significant under Criterion A for its association with early settlement and development of agriculture and ranching in the Grand Lake area. In June of 2021, NRCS again determined, and the Colorado State Historic Preservation Officer (SHPO) concurred that Red Top Valley Ditch retained a preponderance of historic integrity and was eligible for the NRHP.
