From the Mount Whitney Lottery info page, and 2016 Lottery Statistics

2016 Mt Whitney Permit Lottery Results

13,638 applications submitted
 5,010 (36%) were successful 

 3,134 won first choice date (34% were day use,66% overnight
 1,876 won alternate choices.

 Whitney Trail Overnight      Whitney Zone  DAY USE
                           
            Appli-                      Appli-
  Date     cations Hikers   Date       cations Hikers
----------- -----  ------ | ----------- -----  ------
Sat, Aug 06  240   1457   | Sat, Aug 06  174    948
Fri, Aug 05  230   1203   | Sat, Aug 20  152    872
Sat, Jul 02  226   1058   | Sat, Jul 23  144    743

Fri, Aug 12  117    971   | Sat, Jul 16  145    725
Sat, Aug 13  172    172   | Sat, Aug 27  105    651
Sat, Sep 03  178    895   | Sat, Aug 13  120    638

Fri, Aug 19  139    863   | Sat, Jul 30  116    602
Fri, Jul 15  169    855   | Sat, Sep 03   85    500
Sat, Jul 16  163    807   | Sat, Jul 09   86    455
Sat, Jul 23  153    801   | Sun, Sep 04   78    445


Lottery results became available about 9 PM March 23 (Pacific Time).

- - - Timeline - - -
March 24:  Preview results by logging into your account and view your lottery application.  Acceptance period begins April 1.

April 1:  Mini- On-sale.  Any remaining space opens for real time web reservations for the remainder of the season.  On-sale opens at 7 AM Pacific Time (No phone reservations)

April 1- April 30:  Accept or decline if you won a date from the lottery. You must complete your trip information and pay the $15 per person reservation fee to claim your reservation.

Cancellations and declined space will be added back to the reservation calendar within 24 hours at a random time.

April 30:  Deadline closes at midnight Eastern Time. You must accept and pay the reservation fee, or the reservation will be canceled.

May 1:  All unclaimed dates are canceled and released for web reservations (space is released within 24 hours at a random time).