Independent mechanics who know what dirt, weight and distance do to a vehicle, and who will look it over like someone about to drive it a long way from help.
From 7 inches in the San Luis Valley to over 60 inches in a few mountain locations. Wolf Creek Pass averages close to 400 inches of snow
Acres in the Weminuche, the largest wilderness in Colorado 47
499,771
Three quarters the size of Rhode Island by the Forest Service’s comparison, and closed to every vehicle and bicycle
Service before the San Juans, not in them
The towns at the foot of the high passes are small and far apart. Lake City is about 55 miles south of Gunnison on Highway 149, and on the 160-mile Rimrocker Trail fuel is available at Nucla, roughly halfway. Have brakes, cooling, belts, fluids and tires looked at before you leave the Front Range, Grand Junction, Montrose or Durango.
Tell the mechanic where you are going. A vehicle about to hold its own weight back down from 12,800 feet on Engineer Pass deserves a harder look at brakes and transmission cooling than one staying on pavement.
Any competent shop can change oil. What an overland mechanic adds is judgment about a modified, heavily loaded vehicle that is about to spend weeks on rough roads: which wear items will not last the trip, what the lift has done to the front end, and which spares are worth carrying for your platform.
Typical work
01Pre-trip and post-trip inspections
02Scheduled maintenance, done with the trip in mind
03Wheel bearings, ball joints, bushings, U-joints and CV axles
04Cooling, brakes and driveline
05Diagnosis of the noises that started on the last trip
How to choose a mechanic
You are looking for someone who treats the vehicle as transport into remote places, not as a ticket to close.
01Ask if they work on modified vehicles. Some shops will not, and some only reluctantly.
02Ask what a pre-trip inspection covers and whether you get the findings in writing.
03Ask about experience with your platform, especially vans and diesels that need brand-specific diagnostic tools.
04Ask if they will show you the worn parts and explain what can wait.
05A shop that tells you what not to fix yet is one to keep.
What to have ready before you ask for a quote
Good information gets you a better answer, faster.
01Year, model, engine and mileage
02What has been modified
03Symptoms, and when they happen: cold, hot, loaded, at speed, off-camber
04Your trip dates and where you are going
05Service records, if you have them
Questions people ask
What should a pre-trip inspection include?
Fluids and leaks, belts and hoses, brakes, tires including the spare, wheel bearings, steering and suspension joints, the driveline, battery and charging, and the mounting hardware of every bolt-on accessory. Ask for the findings in writing, sorted into what must be fixed before you go and what to watch.
How far ahead of a trip should I book?
Far enough that there is time to order parts and fix what the inspection finds. A few weeks is comfortable. The day before you leave is how trips get cancelled.
My vehicle is modified. Will a regular shop work on it?
Some will, some will not, and some will but do not understand what the modifications changed. Say what has been done in the form so we can look for shops that are comfortable with it.
How high is Colorado?
From Grand Junction at 4,591 feet to Mount Elbert at 14,433.
Altitude decides what your engine, your brakes and your lungs have to work with, and how late in the year the passes open.
4,0006,0008,00010,00012,00014,000
Feet above sea level
Towns
LeadvilleThe city calls itself the highest incorporated city in the United States. Hagerman Pass starts here and Mosquito Pass drops in from the east.10,152 ft
SilvertonSouth end of the Million Dollar Highway. Alpine Loop access on County Road 2; Ophir Pass leaves US 550 just north of town.9,318 ft
Crested ButteAt the upper end of Highway 135, on the West Elk Loop byway.8,885 ft
TellurideAt the head of a box canyon. West end of Imogene Pass and the bottom of the one-way descent from Black Bear Pass.8,789 ft
Lake CityOn Highway 149 about 55 miles south of Gunnison. Eastern gateway to the Alpine Loop.8,671 ft
Buena VistaOn US 24 below the Collegiate Peaks. The road to St. Elmo and Tincup Pass leaves the valley at Nathrop, just to the south.7,960 ft
OurayNorth end of the Million Dollar Highway. Alpine Loop access on County Road 18, and the Ouray end of Imogene Pass.7,786 ft
GunnisonOn US 50 at the start of Highway 135 to Crested Butte. Highway 149 to Lake City leaves US 50 to the west.7,703 ft
SalidaOn US 50 beside the Arkansas River, east of Monarch Pass.7,084 ft
Steamboat SpringsOn US 40 in the Yampa Valley. The Colorado Backcountry Discovery Route passes through on its way to Wyoming.6,731 ft
DurangoWhere US 160 meets US 550 on the San Juan Skyway. US 550 climbs north from here to Silverton and Ouray.6,534 ft
Colorado SpringsOn I-25 at the foot of Pikes Peak, where US 24 heads west into the mountains.6,035 ft
MontroseWhere US 50 meets US 550. East end of the Rimrocker Trail and the gateway to Black Canyon of the Gunnison.5,809 ft
DenverState capital where I-25 meets I-70. The I-70 mountain corridor starts just west at Morrison.5,280 ft
Fort CollinsNorthern Front Range. East end of the Cache la Poudre byway up Poudre Canyon and over Cameron Pass.5,004 ft
Grand JunctionOn I-70 in far western Colorado, about 250 miles west of Denver. Kokopelli’s Trail starts at Loma, just to the west.4,591 ft
Passes, high roads and summits
Mount ElbertThe highest point in Colorado. No road to the top14,433 ft
Mount Blue Sky Scenic BywayIdaho Springs to the top of Mount Blue Sky14,130 ft
Mosquito PassAlma and Fairplay to Leadville13,182 ft
Imogene PassTelluride and Ouray13,114 ft
Black Bear PassUS 550 at Red Mountain Pass, down to Telluride12,840 ft
Engineer PassAlpine Loop Back Country Byway: Lake City, Silverton and Ouray12,800 ft
Cinnamon PassAlpine Loop, between Lake City and Animas Forks12,620 ft
Rollins PassWinter Park east to the Continental Divide. The Needle’s Eye Tunnel has collapsed, so it is no longer a through route by vehicle12,233 ft
Trail Ridge RoadEstes Park to Grand Lake12,183 ft
Courthouse MountainThe monolith above the Owl Creek Pass road, on the Cimarron Ridge12,152 ft
Webster PassMontezuma, in Summit County, south over the Divide toward Handcart Gulch12,098 ft
Independence PassCO 82 between Twin Lakes and Aspen on the Top of the Rockies byway. Paved, closed all winter, and shut to vehicles 35 feet or longer12,095 ft
Hagerman PassLeadville to Basalt, by Ruedi Reservoir11,925 ft
Ophir PassUS 550 north of Silverton to Ophir11,814 ft
Chimney RockThe other landmark of the Cimarron Ridge, seen from the same drive11,781 ft
Boreas PassBreckenridge to Como, over the Continental Divide11,488 ft
Cameron PassWhere the Cache la Poudre to North Park byway crosses out of the Poudre canyon beside State Forest State Park10,276 ft
Owl Creek Pass RoadThe Cimarron Ridge country, on the Ouray Ranger District of the Uncompahgre National Forest10,114 ft
Medano Pass Primitive RoadGreat Sand Dunes to the Wet Mountain Valley and Highway 6910,040 ft
Last Dollar RoadRidgway and Telluride, west of CO 62 and CO 14510,000 ft
Pass, road and summit elevations are the figures published by the agency that manages them. Town elevations are the town’s or county’s own
figure where it publishes an exact one; the rest are from the U.S. Geological Survey (3D Elevation Program at the place’s official coordinates),
retrieved September 18, 2026. Every source is listed at the foot of the page.
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