Exhibit 3.66(a)

State of Delaware
Secretary of State
Division of Corporations
Delivered 05:51 PM 07/23/2010
FILED 05:26 PM 07/23/2010
SRV 100769755 - 4852033 FILE

CERTIFICATE OF FORMATION

OF

CLUBCORP WILLOW CREEK, LLC

1.         The name of the limited liability company is: ClubCorp Willow Creek, LLC

2.         The address of its registered office in the State of Delaware is: 2711 Centerville Road, Suite 400 in the City of Wilmington, Zip Code 19808. The name of its registered agent as such address is: Corporation Service Company.

IN WITNESS WHEREOF, the undersigned has executed this Certificate of Formation of ClubCorp Willow Creek, LLC, this 23rd day of July, 2010.

Authorized Person,

/s/ Amber Imhoff

Amber Imhoff