In the US I believe they are not allowed above 17,999 ft.

From Ultralight news.com:

"A Falcon UL still claims the altitude record of 26,900'."

David

"Dan, U.S. Air Force, retired" wrote in message
news:k6Ple.35783$aB.6376@lakeread03...
What is the altitude record for an ultralight?

Dan, U.S. Air Force, retired