The usual crags are closed for climbing for raptor nesting:

See: bouldercolorado.gov/service….

Click here for the trail closures. Some are M-F, some are 24/7. These impact the Bear Canyon/Fern Canyon regions primarily:

flatironsclimbing.org/tempo…

Click here bouldercolorado.gov/service… for the latest in raptor closures.

Per Ryan Kuehn, Stewardship Director, Boulder Climbing Community: the seasonal raptor closure on the Third Flatiron will be extended beyond July 31st, 2023. The reopening date is TBD. This has been lifted as of 7/26/23 from the OSMP website per Zachary Henry.

bouldercolorado.gov/service…: lifted 7/26/23: Third Flatiron, including Queen Anne’s Head, W.C Fields Pinnacle, 1911 Gully and the Ghetto, the East Bench & West Bench, the East & West Ironing Boards, The Fin, Green Thumb and Jaws.

Update from the Flatirons Climbing Council July 2021: due to late nesting of peregrine falcons this year (2021), this area is closed until ~Aug. 12, 2021.

Information on OSMP wildlife closures, which help to protect sensitive habitats, can be viewed at:

bouldercolorado.gov/service…
maps.bouldercolorado.gov/wi…

The following crags are closed 1 February to 31 July:
First Pinnacle (Gregory Canyon)
Second Pinnacle (Gregory Canyon)
Third Pinnacle (Gregory Canyon)
Third Flatiron
Queen Anne's Head
WC Fields Pinnacle
The Ghetto
East Ironing Board
West Ironing Board
The Fin
Green Thumb
Jaws

Updated details may be found here.
osmpwildlifeclosures.org.