| Mahogany Ridge Brewery & Grill | 435 Lincoln Ave | Steamboat Springs | Colorado | 80477-5084 | United States | brewpub | |
| Main Street Brewery/Four Corners | 21 E Main St | Cortez | Colorado | 81321-3240 | United States | brewpub | |
| Mancos Brewing Company | 484 E. Frontage Rd | Mancos | Colorado | 81328-9079 | United States | brewpub | |
| Manitou Brewing Company | 725 Manitou Ave | Manitou Springs | Colorado | 80829-1809 | United States | brewpub | |
| March Hare Brewing | | Parker | Colorado | 80134-3627 | United States | planning | |
| Mascher Brewing Co. | | Aurora | Colorado | 80014-8226 | United States | planning | |
| Mash Lab Brewing | 4395 Highland Meadows Pkwy | Windsor | Colorado | 80550-8007 | United States | micro | |
| Maxline Brewing | 2724 McClelland Dr Ste 190 | Fort Collins | Colorado | 80525-2575 | United States | micro | |
| McClellan's Brewing Company | 1035 S Taft Hill Rd | Fort Collins | Colorado | 80521-4222 | United States | brewpub | |
| McOva Craft Beer Works, LLC | | Castle Rock | Colorado | 80104 | United States | planning | |
| MillerCoors Brewing Co - Golden | 311 10th St | Golden | Colorado | 80401-5811 | United States | large | |
| Mockery Brewing | 3501 Delgany St | Denver | Colorado | 80216-3617 | United States | micro | |
| Moonlight Pizza | 242 F St | Salida | Colorado | 81201-2104 | United States | brewpub | |
| Mother Tucker Brewery | 2360 E 120th Ave | Thornton | Colorado | 80233-1408 | United States | micro | |
| Mountain Cowboy Brewing Company | 318 5th St | Frederick | Colorado | 80530 | United States | brewpub | |
| Mountain Sun Pub and Brewery | 1535 Pearl St | Boulder | Colorado | 80302-5408 | United States | brewpub | |
| Mountain Tap Brewery | 910 Yampa Street | Steamboat Springs | Colorado | 80487 | United States | brewpub | |
| Mountain Toad Brewing | 900 Washington Ave | Golden | Colorado | 80401-1047 | United States | micro | |
| Nano 108 Brewing Co | 2402 Waynoka Rd | Colorado Springs | Colorado | 80915-1612 | United States | micro | |
| Never Summer Brewing Co | 62 E Agate Ave | Granby | Colorado | 80446 | United States | micro | |
| New Belgium - The Woods At The Source | | Denver | Colorado | 80216-5021 | United States | planning | |
| New Belgium Brewing Co | 500 Linden St | Fort Collins | Colorado | 80524-2457 | United States | regional | |
| New Image Brewing Co | 5622 Yukon St | Arvada | Colorado | 80002-2446 | United States | brewpub | |
| New Planet Beer Co | 3980 Broadway St Ste 103 # 116 | Boulder | Colorado | 80304-1161 | United States | contract | |
| New Terrain Brewing Company | 16401 Table Mountain Pkwy | Golden | Colorado | 80403-1863 | United States | micro | |
| Novel Strand Brewing | 305 W 1st Ave | Denver | Colorado | 80223-1509 | United States | micro | |
| Oasis Brewery | 3257 N Lowell Blvd | Denver | Colorado | 80211 | United States | micro | |
| Odd13 Brewing Inc | 301 E Simpson St | Lafayette | Colorado | 80026-2325 | United States | micro | |
| Odd13 Production Facility | 505 Stacy Ct Ste D | Lafayette | Colorado | 80026 | United States | micro | |
| Odell Brewing Co | 800 E Lincoln Ave | Fort Collins | Colorado | 80524-2507 | United States | regional | |
| Odell Brewing Co - Denver | 2945 Larimer St | Denver | Colorado | 80205-2308 | United States | micro | |
| Odyssey Beerwerks | 5535 W 56th Ave Ste 107 | Arvada | Colorado | 80002-2806 | United States | micro | |
| Old Colorado Brewing Co | 8121 First St. | Wellington | Colorado | 80549 | United States | micro | |
| Open Door Brewing Company | 2030 Ionosphere St Unit G | Longmont | Colorado | 80504-8459 | United States | contract | |
| Oskar Blues Brewery - Lyons | 303 Main St | Lyons | Colorado | 80540 | United States | brewpub | |
| Oskar Blues Brewery & Tasty Weasel Tap Room | 1800 Pike Rd Unit B | Longmont | Colorado | 80501-6794 | United States | regional | |
| Our Mutual Friend Brewing | 2810 Larimer St | Denver | Colorado | 80205-2223 | United States | micro | |
| Ouray Brewery | 607 Main St | Ouray | Colorado | 81427- | United States | brewpub | |
| Ourayle House Brewery | 703 Main St | Ouray | Colorado | 81427-0630 | United States | micro | |
| Out World Brewing | | Longmont | Colorado | 80503-7285 | United States | planning | |
| Outer Range Brewing Co | 182 Lusher Court #2 | Frisco | Colorado | 80443-6601 | United States | micro | |
| Over Yonder Brewing Company | | Golden | Colorado | 80403-8590 | United States | planning | |
| Pagosa Brewing & Grill | 118 N Pagosa Blvd | Pagosa Springs | Colorado | 81147-8470 | United States | brewpub | |
| Palisade Brewing Company | 200 Peach Ave | Palisade | Colorado | 81526 | United States | brewpub | |
| Paonia United Brewing Company | 325 Grand Ave | Paonia | Colorado | 81428 | United States | micro | |
| Paradox Beer Co | 10 Buffalo Ct | Divide | Colorado | 80814-9178 | United States | micro | |
| Parts & Labor Brewing Company | 402 Main St Unit B | Sterling | Colorado | 80751-4343 | United States | brewpub | |
| Pdub Brewing Co | 187 S Purcell Blvd | Pueblo | Colorado | 81007-5081 | United States | brewpub | |
| Peak To Peak Tap & Brew | 16701 E Iliff Ave | Aurora | Colorado | 80013-1148 | United States | brewpub | |
| Peak To Peak Tap & Brew | 9735 E Colfax Ave | Aurora | Colorado | 80010 | United States | micro | |