Writers Contests: Twitter Pitch Contest & Query Contests:
Best article I've found on Pitch Contests: The Most Comprehensive Contest Calendar
Contest Calendar: 2015 from Brenda Drake's Blog. Brenda is the creator and genius behind many of the Twitter Pitch Contests including #PitchWars & #PitMad (Pitch Madness).
Brenda Drake: #PitMad: including a list of all genre and sub genre #hashtags for entering the
Useful Articles & Blog Posts Worth Reading Prior to Entering Pitch Contest:
The Ultimate Writers' Guide to Twitter Pitch Contests: On Writers in the Storm, by Carly Watters: Literary Agent
How #PitMad Helped Me Get a Literary Agent (And Tips for The Next One) - must read advice offered by Diana Urban