The cache is not at the Hairpin bend and parking is only available when the roads are open and it is "two way" traffic over the mountain course.
Not a difficult cache just a small container hidden in a hidey hole low down, in Lhergy Frissle or Claughbane Walk. It could be classed as a "drive by" but the road is not wide enough for parking, unless you are using a bicycle. The cache can also be accessed during "Race Days" as it is on the outside of the TT Course.