Forest maps of three European regions were completed with ERS SAR interferometry. The test-areas are Bern (Switzerland), Lozère (France), and Tuusula (Finland), representing different European forest types and topographic regions. The mapping algorithms used were similar in all cases and well suitable for forest observation. In this contribution the methodology applied and the results achieved are summarized. A discussion of the potential and limitations of ERS SAR interferometry to map forests in Europe is also given.