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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, waivers, and maps HERE.


Open Camping Winter 2018/2019IMG_3646

December 7 – 8 and 14 – 16: OPEN We have heated cabins!

Friday, December 21, 2018 – Tuesday, January 1, 2019: CLOSED for holiday season.

All weekends in January and February are OPEN.  We have heated cabins!



Open Camping Spring 2019

IMG_4062All weekends in March are OPEN.

March 2 is Camp Ondessonk’s Gala Auction in Fairview Heights, IL.  More info HERE.

March 9-10 we are hosting the 5th Annual Maple Sugarin’ Weekend at Camp.  More info HERE.

April 5 – 7: OPEN.  We are also hosting our 3rd Annual Waterfalls, Wildflowers, and Wineries Weekend.  Space is limited.  More info HERE.

April 12 – 14: CLOSED for Spring Lodge Reunion. More info HERE.  Also hosting Stable Round-Up (invite only). 

April 19 – 22: CLOSED for Easter holiday

April 26 – 28: CLOSED for Father-Son Weekend.  More info HERE.

May 3 -5: CLOSED for our NEW SPRING FAMILY CAMP!!!  More info HERE.

May 10 – 12: OPEN.  Also hosting First-Time Camper Open House on Saturday, May 11.  More info HERE.

May 17 – 18: OPEN. This is  the last available Spring weekend.  Open for lodging only.  No meals or programs.  

May 20 – August 11: CLOSED for Summer Camp 2019


Open Camping Late Summer/Fall 2019

10670063_10152763315065782_161944164873389797_nAugust 16 – 18: OPEN for limited lodging only.  No meals or programs. Call for availability.

August 23 – 25: OPEN Limited lodging, meals, and programs.  Call for availability.  Also Hosting The Shawnee Hills 100-Miler Trail Race.  You must register through the organization’s website.  More information on how to register soon.

August 30 – September 2: CLOSED for Friends Weekend. This is an invite-only event. More info soon.

September 6 – 8: OPEN

September 13 – 15: CLOSED for Fall Family Camp.  More info soon.

September 20 – 22OPEN

September 27 – 29: CLOSED for Fall Lodge Reunion.  This event is for Lodge members only.  More info soon. Camp is also hosting Fall Stable Round-Up.  This is an invite-only event.

October 4 – 6: OPEN

October 11 – 13: CLOSED for Mother-Daughter Weekend.  More info soon.

October 18 – 20: CLOSED for Southern Illinois Fat Tire Fest presented by the Bike Surgeon from O’Fallon, IL.  You must register through the organization’s website.  More information on how to register soon.

October 25 – 27: OPEN for limited lodging, but meals and programs will not be available.  Our annual Haunted Hayride will be Friday and Saturday nights and our Fall Family Fest will be Saturday.  More info on both of these great events soon.

November 1 – 3, November 8 – 10, and November 15 – 17: OPEN

 November 22-24: CLOSED for 1st Deer Season

November 28 – December 1: CLOSED for Thanksgiving holiday

December 5 – 8: CLOSED for 2nd Deer Season


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

Greg Santen- Program Director


(618) 695-2489 ext. 129

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