Elktrout Lodge. P.O. Box 614, Kremmling, Colorado 80459. Phone: 1-800-722-3343. Miles of moving water and spring-fed ponds on the headwaters of the Colorado, open only to Elktrout guests. Private waters greet your every cast, while our accommodations feature private baths in every room. We’ve been honored as an Orvis Fly Fishing Lodge of the Year. Book now.