| Manufacturer Name |
Products |
| M.D. Laboratory | personalized iron-on name labels |
| Mad River Rocket | performance sleds |
| Mad Rock | climbing equipment: rock shoes, approach/running shoes, mountaineering boots, harnesses, crash pads, hardware, headlamps, clothing |
| Magellan | gps, maps, accessories |
| Maglite | flashlights |
| Mammut | climbing accessories, ropes, harnesses, shoes, hardware, sleeping bags, backpacks |
| Marin | bikes |
| Marker Ltd. | men's outerwear, bindings, goggles, helmets |
| Marmot | outerwear, gloves, backpacks, sleeping bags, tents, accessories |
| Mary Janes Farm | dried, dehydrated food |
| Masters | trek poles |
| Maui Jim | polarized eyewear, sunglasses |
| Maxim | climbing ropes |
| McHale | backpacks |
| McNett | seam sealers, water repellants, water treatment, tape, patches, essentials, scuba diving and water sports, wader gear, fishing essentials, revivex |
| Merrell | footwear, packs, bags |
| Metolius | climbing gear |
| Metro | pumps |
| Mion | sandals, water footwear |
| Molehill | outdoor children's clothing and mountain gear |
| Montane | ultralight outdoor apparel |
| Montbell | tents, sleeping bags, backpacks, travel bags, cooking equipment, umbrellas, technical clothing |
| Montrail | hiking, climbing, and running footwear, insoles |
| Moonstone | jackets, clothing |
| Mountain Buggy | all-terrain baby strollers |
| Mountain Equipment Co-Op | outdoor sports equipment |
| Mountain Hardwear | apparel, technical clothing, tents, sleeping bags, backpacks, accessories |
| Mountain House | backpacking food, emergency food |
| Mountain Khakis | outdoor pants and clothing |
| Mountain Sprouts | children's outerwear, clothing |
| Mountain Tools | climbing gear, footwear, tech wear, alpine climbing, ice climbing, camping, tents, bivys, mountain rescue |
| Mountainsmith | backpacks, trek poles, accessories |
| Movement Skis | skis, accessories, apparel |
| Moving Comfort | sports bras, women's sport underwear |
| MSR | tents, stoves & fuel, cookware, hydration, water treatment, pack towels, snow equipment, poles |
