ðɪ ˈɑːɾɐwɚ ɹˈeɪs wˈiːkɛnd ˈɔːlsoʊ nˈoʊn æz tˈæmɐɹˌæk ˈɑːɾɐwɚ ɹˈeɪs wˈiːkɛnd fɔːɹ spˈɑːnsɚʃˌɪp ɹˈiːzənz ɪz ɐn ˈænjuːəl wˈiːkɛnd ʌv ɹˈoʊd ɹˈʌnɪŋ ᵻvˈɛnts hˈɛld ðə lˈæst wˈiːkɛnd ʌv mˈeɪ ɪnðə sˈɪɾi ʌv ˈɑːɾɐwə, ɑːntˈæɹɪˌoʊ, kˈænədə.
The Ottawa Race Weekend (also known as Tamarack Ottawa Race Weekend for sponsorship reasons) is an annual weekend of road running events held the last weekend of May in the city of Ottawa, Ontario, Canada.