Scoring 1, 2, 3, 4, 5, and 6 in the same round is not particularly special. It happens several times in each tournament, and it's happened 344 times in MCMM history. However, it is far more unique to record each of those scores at least twice in the same round. A course has to have some holes tough enough to force a six while also providing ample hole-in-one opportunities.
To date, this distinction has only been accomplished seven times. Four of the instances have occurred at Lighthouse, which has one notorious "six-able" hole, a couple other doozies, and many ace possibilities.
Sarah Dooley-- Action Territory, 2001
Sharon Bull-- Lighthouse, 2004
Carrie Donahue-- Lighthouse, 2004
Anita Kemnitz-- Lighthouse, 2009
Ken Huebert-- Sisolak's West (round 1), 2011
Emily Donahue-- Sisolak's West (round 2), 2011
Tommy Schweiss-- Lighthouse, 2012