• Camp Ondessonk Trivia Night

    Holy Trinity Catholic Church 505 Fountains Pkwy, Fairview Heights, IL, United States

    Join us for a blast from the past at Camp O Trivia Night 2026: Through the Decades!  Get ready to time-travel from sock hops to streaming hits -- one question at a time. Grab your friends and dress to impress from your favorite decade! Camp O Trivia Night  Through the Decades Saturday, March 7, 2026…
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  • Learning More About Camp Webinar- A webinar for new and returning campers

    Discover what makes Camp Ondessonk truly unforgettable. Join our Learning More About Camp webinar, created for both new and returning families, and get a behind-the-scenes look at Summer Camp 2026. During this interactive session, you will enjoy a virtual unit tour, meet key members of our leadership team, and gain insight into what makes the…
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  • 🍀 Ancient Order of Hibernians 24th Annual St. Patrick’s Day Parade

    Belleville Illinois

    Saturday, March 14, 2026 | Step-Off at 11:00 AM Get ready to turn the streets green and your spirit even greener. Join Camp Ondessonk as we proudly walk in the Ancient Order of Hibernians St. Patrick’s Day Parade. This is more than a parade. It is a celebration of heritage, friendship, and the power of…
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  • 2026 SPRING LODGE SERVICE WEEKEND

    Camp Ondessonk 3760 Ondessonk Rd, Ozark, IL, United States

    Spring Lodge Service Weekend is a weekend at Camp Ondessonk for Active Lodge Members to come back and help prepare Camp to “open-up” for the Spring & Summer. Participants will spend all day Saturday completing various projects around Camp and enjoy a foil meal and campfire at night. Authorized Lodge adults and Camp staff will…
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  • OPEN CAMPING

    Camp Ondessonk 3760 Ondessonk Rd, Ozark, IL, United States

    Get the true Ondessonk camping experience by sleeping among the trees or under a waterfall!  All cabin units have fire pits, benches, picnic tables, a potable water spigot, an outhouse, and are within a short walk to a shower house. For additional information, or to make your reservation, visit the camping section of our website! Feel free…
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  • OPEN HOUSE

    Camp Ondessonk 3760 Ondessonk Rd, Ozark, IL, United States

    Experience the heart of summer at Camp Ondessonk’s Open House. This FREE event from 1:00-4:00 pm is designed for families to explore, connect, and imagine the adventures ahead. Registration is not required but appreciated for planning purposes. RSVP online today. Guests will enjoy guided tours of cabins, activity areas, and gathering spaces while seeing campers’…
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  • 16th ANNUAL ONDESSONK TRAIL RACES

    Camp Ondessonk 3760 Ondessonk Rd, Ozark, IL, United States

    Join us at Camp Ondessonk for our 16th Annual Ondessonk Trail Races! With two NEW races this year - a half marathon through the beautiful spring wildflowers, and a one-mile fun run that is perfect for families to enjoy the beautiful scenery! Please visit our page on the RunSignup website for more information and to…
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  • SPRING FLING

    Camp Ondessonk 3760 Ondessonk Rd., Ozark, United States

    Celebrate spring at Camp Ondessonk’s Spring Fling on April 11, a fun-filled day that combines our annual trail races with an open house for families and visitors of all ages. The day begins with runners hitting the trails for the 16th Annual Ondessonk Trail Races. Whether you take part in the challenging Half Marathon, scenic…
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  • Learning More About Camp Webinar- A webinar for new and returning campers

    Discover what makes Camp Ondessonk truly unforgettable. Join our Learning More About Camp webinar, created for both new and returning families, and get a behind-the-scenes look at Summer Camp 2026. During this interactive session, you will enjoy a virtual unit tour, meet key members of our leadership team, and gain insight into what makes the…
    Read more