http://store.usgs.gov/pass/access.html

click above for more details

America the Beautiful ??“ National Parks and Federal Recreational Lands Pass ??“ Access Pass
lifetime pass for U.S. citizens or permanent residents w/ permanent disabilities.

Documentation is required to obtain the pass. Acceptable documentation includes: statement by a licensed physician; document issued by a Federal agency such as the Veteran??™s Administration, Social Security Disability Income or Supplemental Security Income; or document issued by a State agency such as a vocational rehabilitation agency.

The pass can only be obtained in person at the park

Just a bump for anyone that may be able to use this.