Jon, it's only 3053 miles per Adventure Cycling. That's a mere 50 miles/day including rest days if you plan on a mid-April finish. You could fly up to Portland to start, it's only another 1200 miles...you've got relations up here if I remember correctly...It only rains in February most of the time around here...
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If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.