| January | Polar Bear Pedal Bike Race | Lamar Parks & Recreation |
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| Banquet Dinner, Meeting and Awards | Lamar Chamber of Commerce |
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| Toy Show | Lamar Elks |
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| February | High Plains Snow Goose Festival | @ Multiple Locations |
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| | LHS Notables Valentine Serenade Dinner | Lamar Christian Church |
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| March | Zonta Rose Day | Zonta Club of Prowers County |
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| PEP Annual Meeting | Prowers Economic Prosperity |
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| Regional Basketball Tournaments | @ Lamar Community Building/LCC Wellness Center |
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| April | Easter Egg Hunts | Lamar Parks & Recreation, Elks Lodge |
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| Share the Spirit Fundraiser | Share the Spirit Foundation |
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| SE Colorado All-Stars Jr. High/HS Rodeo | @ Prowers County Fairgrounds |
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| May | LCC Commencement | @ Lamar Community College |
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| LHS Graduation | @ Lamar High School |
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| Cinco De Mayo | @ Lamar Chamber of Commerce |
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| Wild West BBQ Cook-Off | @ Willow Creek Park |
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| | Annual Amache Pilgrimage | @ Camp Amache, Granada, CO |
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| Lamar Days Parade | City of Lamar, Prowers Medical Center, High Plains Community Health Center |
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| Lamar Days Rod Run & Car Show | Lamar Days Rod Run |
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| June | Lamar Community Social | City of Lamar |
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| July | 4th of July Fireworks Display | Lamar Fire Department |
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| Lamar Partnership Inc. Corporate Cup | Multiple Locations |
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| Windmill Softball Tournament | Lamar Parks & Recreation |
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| August | Tinman Triathlon | Lamar Parks & Recreation |
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| Sand & Sage Roundup Fair & Parade | @ Prowers County Fairgrounds |
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| Sun Valley Rides Carnival | @ Prowers County Fairgrounds |
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| September | 9/11 Tribute & Parade | Tri-State 9/11 Tribute Foundation |
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| Rolling Hills Cowboy Camp | @ Prowers County Fairgrounds |
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| Anthony W Latour Memorial Fund 5K Run & Walk | Lamar Parks & Recreation |
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| Lamar Hospice Fundraiser | @ Lamar Eagles Lodge |
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| October | Moonlight Madness | Lamar Chamber of Commerce |
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| | Beers & Brats for Boobies 5K Race for Breast Cancer Awareness | Benefits Lamar Area Hospice and Southeast Colorado Cancer Initiative |
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| Oktoberfest | Lamar Chamber of Commerce |
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| Trunk or Treats | @ Lamar Public Library, Elks, SDS, LHS |
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| November | LCC Art, Craft & Food Festival | @ LCC Wellness Center |
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| Fantasy Tree Auction | @ Lamar Elks Lodge |
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| Lamar Community Thanksgiving | @ The HOPE Center |
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| December | Parade of Lights | Lamar Chamber of Commerce |
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| Thunder Throwdown Basketball Tournament | Lamar Parks & Recreation |
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| | Holiday Basketball Tournament | @ Lamar Community Building |
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| | Southeastern Colorado Two-Shot Goose Hunt | @ The Historic Cow Palace Inn |
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