The best time for hiking, boating, and fishing at Twin Lakes, Colorado is from June through early September. Campgrounds in the area are typically only open during this time as well, making summer the busiest season but the best time to visit. Avoid the crowds by visiting midweek and staying away on holiday weekends. Independence Pass is closed in winter and does not open until the Thursday before Memorial Day. Depending on early season snow, Independence Pass typically remains open until late October or early November.