| Name | Address, Zip |
| Disabled Adventure Outfitters | Po Box 152, 95518-0152 |
| Amateur Athletic Union Of The United States Inc | 315 Union St Apt 1b, 95521-7115 |
| United States Amateur Rafting Coalition | 1740 Victor Blvd, 95521-9643 |
| Long Prairie Gun And Archery Club | Po Box 416, 95518-0416 |
| Arcata Little League & Babe Ruth League Inc | Po Box 877, 95518-0877 |
| Mckinleyville Rodeo Assn | 346 Lupin Dr, 95521-9652 |
| Mad River Girls Fastpitch Softball Association Inc | Po Box 4361, 95518-4361 |
| International Mountain Bicycling Association | Po Box 386, 95518-0386 |
| Humboldt B525 | Po Box 4848, 95518-4848 |
| Humboldt Composite Mountain Bike Club | 1610 Panorama Dr, 95521-6849 |
| Par Infinity Disc Golf Club | 856 10th St, 95521-6232 |
| Society Of The Holy Trinity | Po Box 931, 95518-0931 |
| Humboldt Timberwolves | Po Box 892, 95518-0892 |
| Humboldt Tri-kids Triathlon | Po Box 32, 95518-0032 |
| Northern Humboldt Steelheads Inc | 900 G Street Ste 103, 95521-6251 |
| Humboldt Wild | 5251 Ericson Way Ste A, 95521-9274 |
| Mad River Youth Soccer League Inc | Po Box 103, 95518-0103 |
| Swim Quest | 1740 Victor Blvd, 95521-9643 |
| |