CLUBS (I am a member of)
Mastiff Club of America (MCOA)
Pacific Southwest Mastiff Club (PSMC)
Mastiff Club of Colorado ( MCOC)
Cascade English Mastiff Club (CEMC)
Colorado Kennel Club (CKC)
Plum Creek Kennel Club (PCKC)

BREEDERS (Alphabetical not by recommendation) Please consider a breeder on this list even if they are not located in your state.
Bluebonnet Mastiffs TX
Goldleaf Mastiffs CA
Gryphon Mastiffs MO
Liberty Mountain Mastiffs CO
Marcy Mountain Mastiffs WA
Pantheon Acres Mastiffs IL
Rainy Days Mastiffs WA (No longer breeding but a good reference)
Triple T Mastiffs CA (No longer breeding but an excellent reference on health issues)

ORGANIZATIONS SUPPORTING MASTIFFS
Mastiff Club of America Charitable Health Trust All proceeds go to the MCOA Health Foundation!
MCOA Rescue: Rescue
Friends Of Rescued Mastiff, Inc.(FORM) - Rescue & Placement Service

INFORMATIONAL SITES ON MASTIFFS
Deb Jones' Page for Mastiffs Doc Robin's Mastiff Medicine Library
Article on Mastiffs Coat Color Mastiff Movement Molosser Dogs

GOOD ARTICLES
Article about the cost of a litter To Breed or Not to Breed
Breed Specific Discrimination Video
How to Choose A Breeder
Its all in how they're raised
Want to Meet My Big Dogs

MISC. SITES
Avidog's Puppy Potty Training Website
Pet Insurance Good Information on Pet Insurances 
CanineCancer.com - Great website on Canine Cancer
Info Dog - General and Dog show Info
Dog Breeds -Various Breed General Information
Dogwise-Books and Supplies Quality Dogs - A directory of quality breeders
Complete Pet Care Guide
I-Love-Dogs.com - Dog, Dogs, a Canine Wonderland! - If you love dogs, visit I-Love-Dogs.com now for tons of free dog stuff!