In the Letters section of the USA Soaring magazine Feb 2011, there was
a reference to a possible glider violation of the "2000' per/1 mile
rule for national parks." I had not heard of this.

Separate from regulation of for-hire sight-seeing flights (which I
understand have been the subject of discussion and regulation), does
anyone have any knowledge of a specific FAA regulation or ruling about
glider flights over US national parks?

Thanks,
- Frank