A trail in Curecanti National Recreation Area approaches eroded volcanic spires rising above Blue Mesa Reservoir. The pinnacles are the remains of ash and breccia from ancient eruptions, creating one of the state's stranger roadside-accessible geologic landscapes.
Filed under roadside oddities: giant objects, odd monuments and things built for no clear reason.
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Source: nps.gov/cure/planyourvisit/dillon-pinnacles-trail.htm