From the RMNP NPS website: 

Lumpy Ridge Raptor Closures (and Openings)

                                        Batman Rock & Pinnacle, Checkerboard and Lightning Rocks at Lumpy Ridge, Colorado.

To protect raptor nesting sites in spring and summer, park staff initiate temporary closures in the Lumpy Ridge and Sheep Mountain areas of the park. The Superintendent may extend or rescind closures based on existing conditions.

Batman Rock, Batman Pinnacle, Lightning Rock,
Checkerboard--Open (as of June 20, 2008)

Deer Ridge Buttress--Open (as of June 20, 2008)

Alligator Rock--Closed March 1, 2008 through July 31, 2008

The Parish, Thunder Buttress--Closed March 1, 2008 through July 31, 2008

Sheep Mountain--Closed March 1, 2008 through July 31, 2008

Twin Owls, Rock One--Closed March 1, 2008 through July 31, 2008

Closures will be lifted or extended as necessary.

Named rock formations, the area extending 100 yards north, east and west of the base of named rock formations and the slopes extending south from the base of the named rock formations downslope to the Gem Lake Trail and Black Canyon Trail, including but not limited to all climbing routes, outcroppings, cliffs, faces, ascent and descent routes and climber access trails to the named rock formations; however, Hen and Chickens, Gollums Arch Rock and the climbers access trail leading to them will remain open. The section of climbers access trail beyond Hen and Chickens leading to Bowles of the Owls is closed.