If you have a vario that lets you load airspace data then you may want to see maddyhome.com/hangglide/airspace.html
In short you can download an airspace file that covers all of the United States. The data will be updated every 28 days from the official US data.
I have only tested the file with a Flytec 6030. I have no idea if the data can be used with other varios.