Thousands of fans will be taking to the TT course in memory of TV star Dave Myers later.
The Hairy Biker died earlier this year from cancer and this year's TT legacy lap will see many fans raising money for cancer charities.
Police are asking those taking part to be at the Grandstand early.
Riders are due to get away at 9.30am.
Castletown hosts tin bath racing
Mountain Road closed for skateboarding today
Peel ready for huge community sale later
Cruise ship makes first stop of week
Tin bath races mean bus diversions tomorrow
MHK wants backing for changes to Tynwald members' pay
Storage firm announces closure
Mountain Road shut for skate setup later