Hi Savvy,
Thank you for contacting the UCSC Genome Browser support team. The hg19 track "GENCODE V26lift37" is currently in our work queue, and it has not yet undergone the pre-production quality control checks. The timing for the release of these data to our production site is currently unknown. However, this track is available on our preview site, and tables can be queried and downloaded through our Table Browser tool at the following url:
Note that the Basic, Comprehensive, and Psuedogenes tables are available under the "table" drop-down field.
If you would like to subscribe to our project announcements, you will be notified when this track is released (see details below).