Seasonal Closures March 1-July 31.
Per this RMNP website, "Initial closures occur in March and April, when raptors return to the region and scout for nesting sites. Areas containing general habitat preferred by raptors are closed during this time. Once raptors have selected nesting spots, the initial closures are lifted or adjusted. The specific areas which raptors choose for nesting sites are closed."
For additional information about raptor closures, please visit the Rocky Mountain National Parks area closures website.