The Whale Shark Tour lasts for 2 days and 1 night.
The Route :
Day I
Leave
Check in time at : 09.30 AM at Head Office in Mataram.
Departure at 10.00 AM
Heading from Mataram to Kayangan Harbor around 2 hours and than taking ferry
Across by ferry around 1,5 - 2 hour arrive at Poto Tano Harbor.
Drive to Sumbawa Besar (stop for simple lunch).
Lunch time at local restaurant (personal account/excluded)
Heading to Labuan Jambu
Arrive & check in hotel
Relax time or take rest

Day II
Starting early on 04.00 AM by Begog boat or traditional boat to Whale Shark point.
1 hour sailing and you arrive at the Whaleshark Point (bagang ship)
6 or 7 AM snorkeling time (depending with the ocean situation)
Breakfast time on the boat after the snorkeling (Coffee/tea - fruits - bread)
08.30 or 9 AM on the way back to the harbor and then to the hotel.
Arrive in hotel & enjoy breakfast at hotel
11 or 12. It is time back to Lombok
Drive back to Poto Tano Harbor
Get in the ferry heading to Lombok about 1,5 - 2 hour
Arrive in Kayangan Harbor (Lombok)
Heading To Mataram 1,5 - 2 hour
Arrive at Mataram, Lombok

Note :
the itinerary & estimated time can be change, depending on adjust traffic, weather and the ferry schedule/activity