| 2004 |
| Classic Champs | October 16-17 | MNOC Classic Champs | sanctioned A meet |
| North American Champs | May | NEEOC North American Champs | sanctioned A meet |
| Long Champs | November 6-7 | BAOC Long Champs | sanctioned A meet |
| Middle Champs | November 6-7 | BAOC Middle Champs | sanctioned A meet |
| Sprint Champs | | OPEN | |
| Relay Champs | September 25-26 | OME Relay Champs | sanctioned A meet |
| Interscholastics | April 17-18 | OCIN Interscholastics | sanctioned A meet |
| Intercollegiates | April 3-4 | WCOC Intercollegiates | sanctioned A meet |
| Night-O Champs | September 25-26 | OME Night-O Champs | sanctioned A meet |
| NA Rogaine Champs | May 29-30 | SLOC NA Rogaine Champs | |
| US Rogaine Champs | | OPEN | |
| Ski-O Champs | | OPEN | |
| Trail-O Champs | June 29 | GAOC Trail-O Champs | sanctioned A meet |
| Team Trials | August 3-4 | RMOC Team Trials | sanctioned A meet |
| 2005 |
| Classic Champs | August 27-28 | ORCA , CROC PNWOF/US Champs Classic Champs | A meet/WRE |
| North American Champs | | N/A | |
| Long Champs | November 12-13 | DVOA, Fair Hill A Event, Maryland Long Champs | sanctioned A meet |
| Middle Champs | previously | OCIN Flying Pig IX Middle Champs | sanctioned A meet |
| Sprint Champs | | OPEN | |
| Relay Champs | August 3-7 | RMOC, Colorado 5 Day, 3 A event days Relay Champs | sanctioned A meet |
| Interscholastics | previously | NTOA Interscholastics | sanctioned A meet |
| Intercollegiates | previously | SLOC Intercollegiates | sanctioned A meet |
| Night-O Champs | August 3-7 | RMOC, Colorado 5 Day, 3 A event days Night-O Champs | sanctioned A meet |
| NA Rogaine Champs | August 2-3 | Sage OC, 24-hr. rogaine, west of Kamloops, Canada NA Rogaine Champs | |
| US Rogaine Champs | | OPEN | |
| Ski-O Champs | | OPEN | |
| Trail-O Champs | previously | USMAOC Trail-O Champs | sanctioned A meet |
| Team Trials | previously | OCIN Flying Pig IX Team Trials | sanctioned A meet |
| 2006 |
| Classic Champs | August 9-20 | BSK/RMOC: 6 A events, other events; WY/CO Classic Champs | sanctioned A meet |
| North American Champs | October 6-9 | GHO: Golden Leaf Orienteering Festival; Milton ON North American Champs | Canadian A meet |
| Long Champs | April 29-30 | EMPO: A event, NY Long Champs | sanctioned A meet |
| Middle Champs | April 29-30 | EMPO: A event, NY Middle Champs | sanctioned A meet |
| Sprint Champs | March 31-April 2 | OCIN: Flying Pig X, sprint, relay, classic; Amelia OH Sprint Champs | sanctioned A meet |
| Relay Champs | March 31-April 2 | OCIN: Flying Pig X, sprint, relay, classic; Amelia OH Relay Champs | sanctioned A meet |
| Interscholastics | April 22-23 | COK: Blue Ridge Classic, 2 day classic; Cedar Mountain NC Interscholastics | sanctioned A meet |
| Intercollegiates | April 8-9 | NEOC: middle, sprint relay, classic; Sturbridge MA/Pomfret CT Intercollegiates | sanctioned A meet |
| Night-O Champs | August 9-20 | BSK/RMOC: 6 A events, other events; WY/CO Night-O Champs | sanctioned A meet |
| NA Rogaine Champs | June 11-12 | ROC: Allegany State Park; near Salamanca NY NA Rogaine Champs | |
| US Rogaine Champs | May 13-14 | CROC: Big Muddy Ranch Rogaine III; Antelope OR US Rogaine Champs | |
| Ski-O Champs | March 11-12 | UNO: Ski-O Champs; Dartmouth College NH Ski-O Champs | sanctioned A meet |
| Trail-O Champs | June 24-25 | BAOC: A event, short at Fallen Leaf, classic at Spooner; Lake Tahoe CA/NV Trail-O Champs | sanctioned A meet |
| Team Trials | May 19-21 | SLOC: sprint, middle, classic; St. Louis/Farmington MO Team Trials | sanctioned A meet |
| 2007 |
| Classic Champs | November 2-4 | QOC: A sprint, 2 day classic; Prince William Forest, Triangle VA Classic Champs | A meet/WRE |
| North American Champs | | N/A | |
| Long Champs | August 4-12 | RMOC, Colorado 5 Day, A event days, Convention Long Champs | sanctioned A meet |
| Middle Champs | August 4-12 | RMOC, Colorado 5 Day, A event days, Convention Middle Champs | sanctioned A meet |
| Sprint Champs | November 2-4 | QOC: A sprint, 2 day classic; Prince William Forest, Triangle VA Sprint Champs | A meet/WRE |
| Relay Champs | September 22-23 | WCOC: Sprint Series Finals, 2 A meet sprints and relay champs; Norwalk and Derby CT Relay Champs | sanctioned A meet |
| Interscholastics | March 31 - April 1 | DVOA: 2 day classic; Fair Hill MD Interscholastics | sanctioned A meet |
| Intercollegiates | March 16-18 | OCIN: Flying Pig XI; Harrison and Cincinnati OH, middle, 2 sprints, classic Intercollegiates | sanctioned A meet |
| Night-O Champs | August 4-12 | RMOC, Colorado 5 Day, A event days, Convention Night-O Champs | sanctioned A meet |
| NA Rogaine Champs | August 25-26 | Laurentian Rogaine, Sainte-Adele, Quebec NA Rogaine Champs | |
| US Rogaine Champs | | OPEN | |
| Ski-O Champs | February 3-4 | BAOC: Sierra Ski-O Week, long and short champs; Truckee/Tahoe City CA Ski-O Champs | sanctioned A meet |
| Trail-O Champs | March 2-4 | Trail-O champs at Umstead meet Trail-O Champs | sanctioned A meet |
| Team Trials | May 4-6 | SMOC: sprint, middle, classic, Pontiac, Michigan Team Trials | A meet/WRE |
