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Be the puff in our marshmallow, the volume in our cheers,
the reason we make Incredible Camp O Campers.

Support Camp Ondessonk with a gift to our Annual Appeal!

Donate Online Here



For those wishing to just kick back and do their own thing, or schedule lodging, meals, or programs a la carte for a family weekend or group event, the following dates are weekends open for group camping and programming at Camp Ondessonk during the school year.  It is advised that weekend groups contact Camp first to inquire about availability and make reservations several months in advance – especially larger groups wanting meals and programs and for dates during the busier months of April, May, September, and October.  Call (618) 695-2489 or email greg.santen@ondessonk.com

Download Reservation Forms HERE.


Open Camping Dates – Late Summer/Fall 2020

10670063_10152763315065782_161944164873389797_nBeginning the weekend of August 7th through August 27th, Ondessonk will be OPEN for groups and families for lodging and meals only. No programs will be available during this time.  

Program options will become available the weekend of August 28th through the Fall.

Other dates of limited or no available services are as follows:

August 21-23: OPEN for limited lodging only. No meals or programs.  Call for availability.  Hosting The Shawnee Hills 100-Mile Endurance Run.  You must register through the organization’s website HERE.

September 4-7: CLOSED – No visitors to Camp will be allowed on Labor Day Weekend. 

September 18-20: OPEN for limited lodging only. Call for availability. All meals and programs are for Fall Family Camp.  More info soon.

September 25-27: CLOSED for Fall Lodge ReunionThis event is for Lodge members only.  More info soon. Camp is also hosting Fall Stable Round-Up.  This is an invite-only event.

October 9-11: OPEN for limited lodging only. Call for availability. All meals and programs are for Mother-Daughter Weekend.  More info soon.

October 15-18: CLOSED for Southern Illinois Fat Tire Fest presented by the Bike Surgeon from O’Fallon, IL.  You must register through the Bike Surgeon’s website HERE.

October 23-25: OPEN for limited lodging, no meals or programs.  Our annual Ondessonk Trail Run and Fall Family Fest will be Saturday.  More info soon.

November 19-22: CLOSED for 1st Deer Season

November 25-29: CLOSED for Thanksgiving holiday

December 2-6: CLOSED for 2nd Deer Season

Open Camping Winter 2020/2021IMG_3646

December 7-20: OPEN – We have heated cabins!

Monday, December 21, 2020 – Sunday, January 3, 2021: CLOSED for the Christmas season.

All other dates in January and February are OPEN.  Call for availability. We have heated cabins!



If you have any questions, please feel free to contact:

Greg Santen- Guest Services Director


(618) 695-2489 ext. 129

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