Hiking is a quintessential part of summer in Colorado for many residents and visitors. If you love to summit fourteeners, consider tackling the extremely difficult Longs Peak since this year is the 150th anniversary of intrepid traveler Isabella Bird’s 1873 ascent. She’s largely responsible for making Estes Park a must-see mountain destination. But if bagging the state’s highest summits isn’t your thing, there are hundreds of other trails worth your efforts.