Ian O Brien, 28, had just reached the top of Hesperus Mountain, northeast of Durango, at about 6:30pm on Saturday. Shortly afterwards, his family lost any form of contact with him.
An experienced hiker has gone missing in Colorado after summiting a mountain over the weekend, and his family is worried he may be disoriented in the wilderness without his epilepsy medication.Ian O'Brien, 28, failed to return after setting off on a solo hike around 2 p.m. in the Echo Basin area of the La Plata
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