Determining the largest high school in Colorado is tricky because "largest" can refer to student population, campus size, or something else. There isn't a readily available, consistently updated, official ranking that definitively answers this. Different sources may use different metrics and have varying degrees of up-to-date information.
To find the answer, you'd likely need to consult multiple sources like Colorado Department of Education data, individual school websites, and news articles. Even then, the answer might fluctuate from year to year.