nˌɪɹ ðə flˈoːɹ ʌvðə bˈeɪsən ðə fˈɔːɹɪst ɡˈɪvz wˈeɪ tə vˈæst mˈɑːɹʃᵻz ænd mˈɛdoʊz ɐsˈoʊsɪˌeɪɾᵻd wɪð ˌʌpɚ klˈæməθ lˈeɪk ænd ðə wˈɪljəmsən ɹˈɪvɚ dɹˈeɪnɪdʒ.
Near the floor of the basin the forest gives way to vast marshes and meadows associated with Upper Klamath Lake and the Williamson River drainage.