The Canary Islands have a total surface area of 752,905 ha, 40 percent of which are protected areas. The study was carried out in Tenerife at the Rural Park of Anaga where sheep and goats graze in semi-extensive farms. The aim of this study was to carry out research into the botanical composition, relative frequency and quality of the grasslands at the Rural Park. A total of 79 pasture samples were analysed for dry matter content (DM), organic matter content (OM), neutral detergent fibre (NDF), acid detergent fibre (ADF) and in vitro organic matter digestibility (IVOMD). The results varied from 86.05 to 92.53 percent DM, from 77.07 to 83.9 percent OM (on DM basis), from 41.76 to 65.92 percent NDF, from 24.54 to 30.05 percent ADF and from 27.98 to 42.07 percent IVOMD.