Sentence:  Michigan , Wisconsin and Minnesota have many superb stretches of color which reach their height from the last few days of September well into October , especially in their northern sections , e. g. , Wisconsin 's Vilas County whose Colorama celebration <WSD>is</WSD> Sept. 29 - Oct .8 . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)