Have a 9 y.o. mare. She's completed 2 50's many many miles of tough LD's
and CTR. Doing a 50 this weekend and then either a 50 or 75 next month.
Contemplating trying the OD 100.
I've read from many folks that is speed that will hurt the horse and not
the distance.
I know of many people that barely do any 50's in preparation of a 100. John
crandell's horse that was at a 100 this winter only completed 1 50 before his
first 100 and heraldic 3 50's before Tevis.
This will be her 4th year in competition. Just completed a really hot
and tough 30-35 mile CTR with only 30 minutes at 1/2 way hold. Ride time
was around 5 hrs. I think. Just about every horse was overtime. The last 5
miles she zoomed. She finally woke up! I think she'll do great on the longer
distances. I know all horses are different just trying to get some more
opinions.