Being from Loveland, CO I can tell you that living in Northern Colorado is a photographers paradise. There are countless places within an hours drive from Fort Collins, including Rocky Mountain National Park (I am up there at least 3 times a month since I live 30 minutes from there).
For sunset/sunrise shots right in Fort Collins, you can to up to Horsetooth Reservoir, or out to one of the local lakes. Bobcat Ridge Nature area has some great trails and a chance to photograph elk and deer (and bobcats
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If you are active, you can't beat Northern Colorado for the amount of outdoor activity available. Huge amounts of trails are in the area with many offering great photo opportunities.
Welcome!