The famous mountain circuit sees the first action of its centenary year this evening (Monday).
The first qualifying session of TT 2011 will feature solo machines and sidecars, in a schedule which will be repeated throughout the week.
The mountain section closes at 5pm, an hour before the rest of the circuit, with the solo riders setting off from the Grandstand from 6.20pm.
The solos are due to finish just before 8pm, when the sidecars will have their turn, for 50 minutes.
That format will be repeated every day up to Friday, and the first races of the meeting will be on Saturday.
The six lap Dainese Superbike TT starts at 12 noon, with the Sure Sidecar TT Race 1, over three laps, at 3pm.
You can keep up to date with all the latest information on Manx Radio TT, by tuning to 1368 AM anywhere on the Island, or 100.6 FM in areas of the north of the course and 87.9 FM in the Douglas area.