| 2004 |
| North American Champs | May | NEEOC North American Champs | sanctioned A meet |
| Sprint Champs | | OPEN | |
| Middle Champs | November 6-7 | BAOC Middle Champs | sanctioned A meet |
| Long Champs | November 6-7 | BAOC Long Champs | sanctioned A meet |
| Classic Champs | October 16-17 | MNOC Classic Champs | sanctioned A meet |
| Relay Champs | September 25-26 | OME Relay Champs | sanctioned A meet |
| Night-O Champs | September 25-26 | OME Night-O Champs | sanctioned A meet |
| Interscholastics | April 17-18 | OCIN Interscholastics | sanctioned A meet |
| Intercollegiates | April 3-4 | WCOC Intercollegiates | 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 |
| North American Champs | | N/A | |
| Sprint Champs | | OPEN | |
| Middle Champs | previously | OCIN Flying Pig IX Middle Champs | sanctioned A meet |
| Long Champs | November 12-13 | DVOA, Fair Hill A Event, Maryland Long Champs | sanctioned A meet |
| Classic Champs | August 27-28 | ORCA , CROC PNWOF/US Champs Classic Champs | sanctioned A meet |
| Relay Champs | August 3-7 | RMOC, Colorado 5 Day, 3 A event days Relay Champs | sanctioned A meet |
| Night-O Champs | August 3-7 | RMOC, Colorado 5 Day, 3 A event days Night-O Champs | sanctioned A meet |
| Interscholastics | previously | NTOA Interscholastics | sanctioned A meet |
| Intercollegiates | previously | SLOC Intercollegiates | 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 |
| North American Champs | October 6-9 | GHO: Golden Leaf Orienteering Festival; Milton ON North American Champs | Canadian A meet |
| Sprint Champs | March 31-April 2 | OCIN: Flying Pig X, sprint, relay, classic; Amelia OH Sprint Champs | sanctioned A meet |
| Middle Champs | April 29-30 | EMPO: A event, NY Middle Champs | sanctioned A meet |
| Long Champs | April 29-30 | EMPO: A event, NY Long Champs | sanctioned A meet |
| Classic Champs | August 9-20 | BSK/RMOC: 6 A events, other events; WY/CO Classic Champs | sanctioned A meet |
| Relay Champs | March 31-April 2 | OCIN: Flying Pig X, sprint, relay, classic; Amelia OH Relay Champs | sanctioned A meet |
| Night-O Champs | August 9-20 | BSK/RMOC: 6 A events, other events; WY/CO Night-O 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 |
| 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 |
| North American Champs | | N/A | |
| Sprint Champs | November 2-4 | QOC: A sprint, 2 day classic; Prince William Forest, Triangle VA Sprint Champs | sanctioned A meet |
| Middle Champs | August 4-12 | RMOC, Colorado 5 Day, A event days, Convention Middle Champs | sanctioned A meet |
| Long Champs | August 4-12 | RMOC, Colorado 5 Day, A event days, Convention Long Champs | sanctioned A meet |
| Classic Champs | November 2-4 | QOC: A sprint, 2 day classic; Prince William Forest, Triangle VA Classic Champs | sanctioned A meet |
| 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 |
| Night-O Champs | August 4-12 | RMOC, Colorado 5 Day, A event days, Convention Night-O 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 |
| 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 | sanctioned A meet |
| 2008 |
| North American Champs | September 26-28 | CNYO: A event sprint, middle, classic; Central NY venues North American Champs | sanctioned A meet |
| Sprint Champs | April 4-6 | OCIN: Flying Pig XII, Hamilton/Amelia, OH Sprint Champs | sanctioned A meet |
| Middle Champs | April 19-20 | ROC: A Meet; Rochester/Danville NY Middle Champs | sanctioned A meet |
| Long Champs | April 4-6 | OCIN: Flying Pig XII, Hamilton/Amelia, OH Long Champs | sanctioned A meet |
| Classic Champs | August 4-10 | Laramie Daze including 2 A days, Laramie WY Classic Champs | sanctioned A meet |
| Relay Champs | April 19-20 | ROC: A Meet; Rochester/Danville NY Relay Champs | sanctioned A meet |
| Night-O Champs | | OPEN | |
| Interscholastics | February 15-17 | NTOA: 2 day classic + sprint, Athens, TX Interscholastics | sanctioned A meet |
| Intercollegiates | February 23-24 | TSN: Western States and Intercollegiate Champs, Kentucky Camp/Greaterville, AZ Intercollegiates | sanctioned A meet |
| NA Rogaine Champs | | OPEN | |
| US Rogaine Champs | June 14-15 | ROC/BFLO: Allegany State Park Rogaine, NY US Rogaine Champs | sanctioned A meet |
| Ski-O Champs | | OPEN | |
| Trail-O Champs | November 14-16 | BAOC: O in the Oaks V (SML A event), Joe Grant Park, near San Jose, CA Trail-O Champs | sanctioned A meet |
| Team Trials | May 24-26 | DVOA: Team Trials, Bethlehem/White Haven, PA Team Trials | sanctioned A meet |
| 2009 |
| North American Champs | | N/A | |
| Sprint Champs | September 19-20 | ROC: A event; Rattlesnake SF, Dansville NY/Mendon Sprint Champs | sanctioned A meet |
| Middle Champs | June 27-28 | COC: A meet, Salmon La Sac, near Cle Elum, WA Middle Champs | sanctioned A meet |
| Long Champs | | OPEN | |
| Classic Champs | October 23-25 | BGR: US Classic Champs (1 Day+), Greenbush, WI Classic Champs | sanctioned A meet |
| Relay Champs | April 3-5 | OCIN: Flying Pig XIII, Cincinnati, OH Relay Champs | sanctioned A meet |
| Ultra Long Champs | September 19-20 | ROC: A event; Rattlesnake SF, Dansville NY/Mendon Ultra Long Champs | sanctioned A meet |
| Night-O Champs | | OPEN | |
| Interscholastics | April 18-19 | USMAOC: Sprint/Middle/Long A event. West Point NY Interscholastics | sanctioned A meet |
| Intercollegiates | March 27-29 | QOC: Ran-it Granite: Sprint/Middle/Long + Sprint Relay, Granite, MD Intercollegiates | sanctioned A meet |
| NA Rogaine Champs | May 16-17 | TOC: NA Rogaine Champs, Mogollon Plateau, central AZ NA Rogaine Champs | |
| US Rogaine Champs | | OPEN | |
| Ski-O Champs | | OPEN | |
| Trail-O Champs | December 5-6 | LAOC: Sprint/Middle/Trail-O A meet, Vasquez Rocks, near Santa Clarita, CA Trail-O Champs | sanctioned A meet |
| Team Trials | May 1-3 | BAOC: Team Trials (SML), Spring Lake/Boggs Mtn., Cobb CA Team Trials | sanctioned A meet |
| WRE1 | June 27-28 | COC: A meet, Salmon La Sac, near Cle Elum, WA WRE1 | sanctioned A meet |
| WRE2 | May 1-3 | BAOC: Team Trials (SML), Spring Lake/Boggs Mtn., Cobb CA WRE2 | sanctioned A meet |
| WRE3 | May 1-3 | BAOC: Team Trials (SML), Spring Lake/Boggs Mtn., Cobb CA WRE3 | sanctioned A meet |
| WRE1(CA) | August 21-30 | Canadian Orienteering Champs, Manitoba venues WRE1(CA) | Canadian A meet |
| WRE2(CA) | August 21-30 | Canadian Orienteering Champs, Manitoba venues WRE2(CA) | Canadian A meet |
| WRE3(CA) | | OPEN | |
