Mezue ahịrịokwu na-esonụ: Na 2008 Summer Olympics na Beijing, Ragnheiður ruru eru maka oge nke abụọ na otu mmemme igwu mmiri dị ka Egwuregwu ndị gara aga. O kpochapụrụ FINA B-belata nke 25.95 (50 m freestyle) site na Dutch Open Swim Cup na Eindhoven na 56.06 (100 m freestyle) site na FINA World Championships na Melbourne. Na 100 m freestyle, e kenyere ya na okpomọkụ atọ megide ndị ọzọ na-egwu mmiri asaa, gụnyere Hong Kong's Hannah Wilson na Bahamas's Arianna Vanderpool-Wallace. O metụrụ Anna Stylianou nke Saịprọs aka iji were ebe nke ise na nke iri atọ na ise n'ozuzu site na narị atọ nke abụọ (0.03), na oge nke 56.35 sekọnd. N'ime
50 m freestyle, Ragnheiður mechara nke anọ na okpomọkụ asatọ site na 0.13 nke abụọ n'azụ Natasha Moodie nke Jamaica, na 25.82. Ragnheiður enweghị ike ịga n'ihu na ọkara ikpeazu, ebe o tinyere iri atọ na isii n'ime ndị na-egwu mmiri iri itoolu na abụọ na mgbede mgbede.