Imogene and Black Bear Pass

Above Telluride, two famous backcountry roads cross the high San Juan Mountains. Imogene Pass climbs to more than 13,000 feet and connects Telluride with Ouray over the crest of the range, following a route that miners once used to move between the two towns. Black Bear Pass reaches nearly 13,000 feet and drops down toward Telluride in a series of steep switchbacks that have given it a reputation as one of the most demanding roads in Colorado. Both offer immense views, remnants of the mining era and wildflower basins that few visitors ever see. These are not casual drives. They are narrow, rocky shelf roads at extreme altitude, and in places the drop-offs are sheer. They are best tackled in a high-clearance, short-wheelbase four-wheel-drive vehicle by drivers who have real off-road experience, or on a guided tour where the driver knows the conditions.

Imogene Pass is the more approachable of the two, though still serious. Its summit is among the highest road crossings in the state, and every September it is the setting for a well-known foot race between Ouray and Telluride. The road is usually passable from midsummer to early autumn, once the deep snow clears, and it rewards drivers with sweeping views, old mine buildings and alpine lakes.

Black Bear Pass, by contrast, is typically driven in one direction only, from Red Mountain Pass down toward Telluride, and includes tight switchbacks above the town that are not for the nervous. Many experienced drivers consider it a bucket-list route; many others decide it is too much. Be honest about your skills and your vehicle.

Conditions change quickly. Snow can linger on the passes well into July, summer thunderstorms build in the afternoon and make rocks slippery, and early snow can close roads in September. Local rental companies and visitor centers publish current road reports, and it is wise to ask before setting off. Carry water, food, layers, a spare tire and a charged phone, though signal is patchy. Start early so you are off the exposed sections before the afternoon storms, and give way to uphill traffic as local etiquette demands.

If you want to experience the passes without the risk, book a guided tour or ask the operators about routes suited to your comfort level. A half-day jeep tour covers lower and gentler tracks with similar views, and the Million Dollar Highway offers a paved alternative for a scenic mountain drive. For most travelers the smart choice is to enjoy these famous passes from a guide's passenger seat, or from the trailheads on foot, rather than behind the wheel.

Preparation is the difference between an unforgettable day and a bad one. Fill the tank before you leave, carry a full-size spare and the tools to change it, and bring recovery gear if you have it. Tell someone where you are going and when you plan to return. Know your own limits: turning around is always an acceptable choice, and no photograph is worth a rollover on a shelf road.

Local outfitters rent suitable vehicles and will gladly talk through current conditions, and the visitor center can point you toward easier alternatives with excellent scenery if the high passes are closed or beyond your comfort.