How to get to Mourningwood Glen

First, get to Arlington *grin*. If you're coming from the south, get to I-20, and head towards Arlington. Once you get to Cooper Street, head north on Cooper Street until you reach Arkansas Lane. Turn left onto Arkansas Lane and head down till you get to Spanish Trail. Left on Spanish Trail, and take the first park entrance. We're under the set of pavilions beyond the kid's park.
If you're coming from the north, get on I-30, and head for Arlington. Exit Cooper Street, and head south (past UTA) till you reach Arkansas Lane. Right on Arkansas, and you can follow the above directions from there.