| 2009 |
| May 1-3 | BAOC: /Team Trials (Sprint/Middle/Long), Spring Lake/Boggs Mtn., Cobb CA Team Trials | Docs |
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| April 18-19 | USMAOC: Sprint/Middle/Long A event. West Point NY Interscholastics | Docs |
| 2008 |
| November 14-16 | BAOC: O in the Oaks V (SML A event), Joe Grant Park, near San Jose, CA Trail-O Champs | Docs |
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| October 25-26 | NEOC: 2 day classic A event; Mt Tom State Reservation, MA | Docs |
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| September 26-28 | CNYO: A event sprint, middle, classic; Central NY venues North American Champs | Docs |
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| August 4-10 | Laramie Daze including 2 A days, Laramie WY Classic Champs | Docs |
| August 2-3 | Northwest Forest Frenzy; COC juniors, A meet Cle Elum area, WA | Docs |
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| June 20-22 | BAOC: Tahoe 3 Day, Northstar Resort, Lake Tahoe, CA | Docs |
| June 14-15 | ROC/BFLO: Allegany State Park Rogaine, NY US Rogaine Champs | Docs |
| |
| May 24-26 | DVOA: Team Trials, Bethlehem/White Haven, PA Team Trials | Docs |
| May 3-4 | USMAOC: Sprint/Middle/Long A event. West Point NY | Docs |
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| April 19-20 | ROC: A Meet; Rochester/Danville NY Relay Champs Middle Champs | Docs |
| April 4-6 | OCIN: Flying Pig XII, Hamilton/Amelia, OH Long Champs Sprint Champs | Docs |
| |
| February 23-24 | TSN: Western States and Intercollegiate Champs, Kentucky Camp/Greaterville, AZ Intercollegiates | Docs |
| February 15-17 | NTOA: 2 day classic + sprint, Athens, TX Interscholastics | Docs |
| |
| January 19-20 | GAOC: Georgia Navigator Cup, 2 day classic; Mistletoe GA | Docs |
| January 19-21 | SDO: Anza-Borrego O-Fest, 2 day classic, other events; Borrego Springs CA | Docs |
| 2007 |
| November 2-4 | QOC: A sprint, 2 day classic; Prince William Forest, Triangle VA Sprint Champs Classic Champs | Docs |
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| October 27-28 | LAOC: Camp Sherman A Meet, Hemet CA | Docs |
| October 20-21 | CAOC: Big Blues Ramble, 2 Day Classic, Darien IL | Docs |
| October 13-14 | BAOC: 2 day classic A event; Boggs Mountain State Forest, CA | Docs |
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| September 29-30 | UNO: Boulder Dash, Nottingcook Forest, Bow NH | Docs |
| September 22-23 | WCOC: Sprint Series Finals, 2 A meet sprints and relay champs; Norwalk and Derby CT Relay Champs | Docs |
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| August 4-12 | RMOC, Colorado 5 Day, A event days, Convention Middle Champs Night-O Champs Long Champs | Docs |
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| May 4-6 | SMOC: sprint, middle, classic, Pontiac, Michigan Team Trials | Docs |
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| April 28-29 | USMAOC: A event. West Point NY | Docs |
| April 21-22 | HVO, 2 day classic A event, Surebridge Mtn., Harriman, NY | Docs |
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| March 31 - April 1 | DVOA: 2 day classic; Fair Hill MD Interscholastics | Docs |
| March 16-18 | OCIN: Flying Pig XI; Harrison and Cincinnati OH, middle, 2 sprints, classic Intercollegiates | Docs |
| March 2-4 | Trail-O champs at Umstead meet Trail-O Champs | |
| March 2-4 | BOK/US Team: Fundraiser IV; Umstead Park, Raleigh NC | Docs |
| |
| February 17-18 | GAOC: Georgia Navigator Cup, 2 day classic; Atlanta GA | Docs |
| February 3-4 | BAOC: Sierra Ski-O Week, long and short champs; Truckee/Tahoe City CA Ski-O Champs | |
| 2006 |
| December 31 | OCIN: New Years O Festival; Oxford OH, 2 A meet sprints | |
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| November 11-12 | DVOA: short classic, classic A event: Pine Barrens, southern NJ | |
| November 4-5 | BAOC: 2 day classic A event; Morgan Territory CA | |
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| September 23-24 | CNYO: short, sprint, classic A event; Virgil/Cortland NY | |
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| August 9-20 | BSK/RMOC: 6 A events, other events; WY/CO Night-O Champs Classic Champs | |
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| June 24-25 | BAOC: A event, short at Fallen Leaf, classic at Spooner; Lake Tahoe CA/NV Trail-O Champs | |
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| May 19-21 | SLOC: sprint, middle, classic; St. Louis/Farmington MO Team Trials | |
| May 13-14 | CROC: Big Muddy Ranch Rogaine III; Antelope OR US Rogaine Champs | |
| May 6-7 | USMAOC: A event. 2 day classic; Long Mountain/Lake Popolopen, West Point NY | |
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| April 29-30 | EMPO: A event, NY Long Champs Middle Champs | |
| April 22-23 | COK: Blue Ridge Classic, 2 day classic; Cedar Mountain NC Interscholastics | |
| April 8-9 | NEOC: middle, sprint relay, classic; Sturbridge MA/Pomfret CT Intercollegiates | |
| |
| March 31-April 2 | OCIN: Flying Pig X, sprint, relay, classic; Amelia OH Sprint Champs Relay Champs | |
| March 31 | OCIN: Flying Pig X, additional middle A day; Amelia OH | |
| March 11-12 | UNO: Ski-O Champs; Dartmouth College NH Ski-O Champs | |
| |
| February 25-26 | FLO/US Team: middle distance, classic distance A Event; Deland FL | |
| February 24 | FLO/US Team: sprint distance A event; Deland FL | |
| February 18-19 | GAOC: Georgia Navigator Cup, 2 day classic; Pine Mountain GA | |
| |
| January 14-16 | LAOC and SDO: Anza-Borrego O-Fest, 2 day classic, other events; Borrego Springs CA | |
| 2005 |
| November 12-13 | DVOA, Fair Hill A Event, Maryland Long Champs | |
| |
| October 22-23 | BAOC, O in the Oaks III | |
| October 15-16 | UNO, Boulder Dash | |
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| August 27-28 | ORCA , CROC PNWOF/US Champs Classic Champs | |
| August 20-28 | ORCA , CROC, CTOC PNWOF (6 A days (sprints, middle, classic), relay, AR, AGM, Junior training) | |
| August 3-7 | RMOC, Colorado 5 Day, 3 A event days Night-O Champs Relay Champs | |
| |
| previously | SLOC Intercollegiates | |
| previously | NTOA Interscholastics | |
| previously | USMAOC Trail-O Champs | |
| previously | OCIN Flying Pig IX Team Trials Middle Champs | |
| 2004 |
| November 6-7 | BAOC Middle Champs Long Champs | |
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| October 16-17 | MNOC Classic Champs | |
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| September 25-26 | OME Relay Champs Night-O Champs | |
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| August 3-4 | RMOC Team Trials | |
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| June 29 | GAOC Trail-O Champs | |
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| May | NEEOC North American Champs | |
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| April 17-18 | OCIN Interscholastics | |
| April 3-4 | WCOC Intercollegiates | |
