Reference: https://aqha.com/media/8873/2015-event-totals-through-12-14-completion.pdf
Top 20 Shows For 2015: (unofficial) ranking by entry totals
#1- Oklahoma QHA Redbud Spectacular (8 judges)- 15,839 entries
#2- Arizona Sun Country Circuit (8 judges)- 14,809 entries
#3- Oregon Summer Classic (8 judges)- 9,245 entries
#4- Silver Dollar Circuit (6 judges) – 8,247 entries
#5- Big A Circuit (6 judges)- 7,996 entries
#6- Lucky Seven Classic (6 judges)- 7,896 entries
#7- Dixie Nationals (4 judges)- 7,594 entries
#8- All American Quarter Horse Congress- 7,542 entries
#9- SOQHA The Madness (6 judges) – 7,131 entries
#10- Iowa Seven Day Run (6 judges)- 6,707 entries
#11- July Centre Hall (6 judges)- 6,522 entries
#12- The Buckeye Classic (5 judges)- 6,360 entries
#13- IN Youth Show (6 judges)- 6,186 entries
#14- Harbor Classic (6 judges)- 6,119 entries
#15- Florida Gold Coast (6 judges)- 5,985 entries
#16- Region 6 Mass (6 judges)- 5,871 entries
#17- OKC Spring Show (5 judges)- 5,772 entries
#18- Big Country Waco (6 judges)- 5,584 entries
#19- Cornhusker (6 judges)- 5,565 entries
#20- Keystone Showdown (6 judges)- 5,539 entries