Sentence:  Michigan , Wisconsin and Minnesota have many superb stretches of color which <WSD>reach</WSD> 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 is Sept. 29 - Oct .8 . 
Meaning of the word marked with <WSD> tags:  reach a point in time, or a certain state or level