Announcement Of Tours

Dear Seniors,
Greetings of the Day..!!
I am working as HR Executive in one of IT company, and we are planning to going for trekking tour. Our management has decided that we draft a announcement letter and send it to our employee by mail. I am not aware about how to draft a mail regarding this. Kindly let me know your valuable thought.
Thanks,

You could write something like this
A trekking trip to ------ (place) is being planned on ----------(date).
This place is a historical fort with a beautiful view of the place.
Willing members are requested to give their names to----(Name,appointment,phone,emailID) by -------(date).
Detailed programme will be displayed on ------(date)
Remember all work and no play make Jack a dull boy.
Come and let us enjoy the splendour of the hills and enjoy ourselves.
Arrangement for breakfast and lunch will be made.
Looking forward to whole hearted presence of all members.