Summers are hot along the Front Range, especially in the lower foothills. It's a time of year when many hikers and bikers head for the higher peaks. Heavy traffic on I-70 has become a sad fact of life for those wanting to explore the Front Range and Colorado's High Country. Slowdowns correspond with normal morning and afternoon rush hours, but peak on Friday and Sunday afternoons when stop-and-go jams are the norm, particularly around Idaho Springs and Georgetown. Winter traffic fares little better with regular slowdowns in the morning rush to the Summit County ski resorts, and afternoon returns. Many locals claim the best seasons in Colorado are the spring and fall "mud seasons" when the tourists are gone and the trails are empty. In spring the Front Range is carpeted with fresh new growth, while late September brings the shimmering gold of turning aspens. The interstate is well maintained, but it can see snow any time of the year at the Eisenhower Tunnel. Drive defensively, especially downhill to Denver and Dillon where runaway truck ramps see a fair bit of use.