169 entries have been received so far for June's Clerical Medical Parish Walk.
However, last year's winner Robbie Collister and record holder Sean Hands have yet to make their intentions clear.
The latest figure is just a fraction of the numbers expected to take part.
Last year, 1,329 registered to start the event.
TT 2025: Triple-header of opening racing planned for tomorrow
Evening contingency session also available if requiredÂ
TT 2025: Michael Dunlop tops the board in Qualifying 5
29-time winner's Superbike sets best pace of the day
TT 2025: Hickman thanks marshals, medics and staff after crash
14-time TT winner was involved in incident at Kerrowmoar on Friday (30 May)
Richard Hammond makes first visit to Isle of Man TT
Renowned motoring presenter and journalist led out today's legacy lap
TT 2025: Todd sets fastest lap of meeting in brief qualifying session
Session scrapped after just over an hour due to poor weather