| January 2010 |
| Day | Event | Description | More |
| 15 | Toronto Rock vs. Boston | | |
| 23 | Toronto Rock vs. Rochester | | |
| February 2010 |
| Day | Event | Description | More |
| 5 | Toronto Rock vs. Philadelphia | | |
| 12 | Toronto Rock vs. Edmonton | | |
| 13 | Referee Clinic (Level 3-5) | TBA | |
| 27 | Toronto Rock vs. Orlando | | |
| March 2010 |
| Day | Event | Description | More |
| 5-6 | OLA Semi-Annual Meeting | Mississauga - Delta Meadowvale | |
| 6 | Referee Clinic (Box) | London | |
| 7 | Referee Clinic (Box) | Zone 10 | |
| 7 | Referee Clinic (Field) | Kitchener | |
| 12 | Toronto Rock vs. Buffalo | | |
| 27 | Referee Clinic (Box) | Sudbury | |
| 27 | Referee Clinic (Box) | Ottawa | |
| 27 | Referee Clinic (Field) | Mississauga/Brampton | |
| 28 | Referee Clinic (Box) | Midland | |
| 28 | Referee Clinic (Field) | Ottawa | |
| April 2010 |
| Day | Event | Description | More |
| 2 | Toronto Rock vs. Chicago | | |
| 9-11 | Jammer Classic Memorial Tournament | Toronto | |
| 10 | Referee Clinic (Box) | Guelph | |
| 10 | Referee Clinic (Field) | Whitby | |
| 11 | Referee Clinic (Box) | Whitby | |
| 16 | Toronto Rock vs. Rochester | | |
| 17 | Referee Clinic (Box) | Zone 9 | |
| 17 | Referee Clinic (Box) | Thunder Bay | |
| May 2010 |
| Day | Event | Description | More |
| 21-23 | OLA Minor Field Provincial Championships | TBA | |
| June 2010 |
| Day | Event | Description | More |
| 15 | Provincial Entry Deadline | OLA Office | |
| 19-26 | Final Zone Ratings Week | | |
| July 2010 |
| Day | Event | Description | More |
| 4 | Final Ratings Meeting | TBA | |
| 4 | Ratings Appeal Meeting | TBA | |
| 5 | Final Ratings Released | www.ontariolacrosse.com | |
| 9-11 | 1st Provincial 'A' Qualifier Tournament | Whitby | |
| 16 | Provincial Schedules Released | www.ontariolacrosse.com | |
| 23-25 | 2nd Provincial 'A' Qualifier Tournament | Whitby | |
| 30-August 8 | Ontario Lacrosse Festival | Whitby | |
| August 2010 |
| Day | Event | Description | More |
| 1-7 | Pee Wee Lacrosse Championship of Canada | Whitby | |
| 1-7 | Bantam Lacrosse Championship of Canada | Whitby | |
| 10-12 | Midget 'A' Finals - Ontario Summer Games | Sudbury | |
| 13-15 | Final Six 'A' Provincials (Pee Wee & Bantam) | TBA | |
| 14-22 | Founders' Cup (Canadian Junior "B" Championship) | Mimico | |
| 21-29 | Minto Cup (Canadian Junior "A" Championship) | Coquitlam, British Columbia | |
| September 2010 |
| Day | Event | Description | More |
| 3-5 | Alumni Cup (Canadian U16 Men' Field Championship) | TBA | |
| 8-18 | Mann Cup (Canadian Major Championship) | Ontario | |
| October 2010 |
| Day | Event | Description | More |
| 8-10 | Ross Cup (Canadian Senior Men's Field Championship) | TBA | |
| November 2010 |
| Day | Event | Description | More |
| 5-6 | OLA Annual General Meeting | TBA | |
