Fuel Planning for a Colorado Trail Day
A Colorado trail day can turn into a long fuel-planning exercise when a route climbs above treeline, detours around a closure, or simply takes longer than expected. The nearest pump may be back in town, not along the trail. This guide explains how to estimate your machine’s real range, plan refueling and backup fuel, and avoid getting stranded far from a trailhead.
Start With Your Machine’s Real-World Range
Use your own fuel records, not a brochure estimate
A manufacturer’s range figure can be a useful starting point, but it may not resemble a day on a Colorado trail. Steep climbs, loose rock, low-speed crawling, frequent stops, passengers, cargo, and a heavy throttle can all increase fuel use. A machine that seems economical on a flat road may use noticeably more fuel climbing toward Engineer Pass or working through rough sections near Taylor Park.
Build your estimate from rides in conditions similar to the trip you’re planning. Note how much fuel you added before and after a ride, the distance traveled, and what the terrain was like. If you do not have a full season of records, start with a conservative estimate and update it after each outing. Keep a simple log in your phone or notebook; even a few rides can show whether your usual pace and terrain are harder on fuel than you expected.
Measure fuel use with a consistent method
Choose a repeatable way to track fuel. One option is to fill the tank to the same level before each ride, record the odometer reading, then refill and record how much fuel it takes after the ride. Avoid relying on a fuel gauge alone if you have not checked how accurately it reflects remaining fuel on uneven ground. A tank that looks comfortable on level pavement may read differently when the machine is tilted on a rocky climb.
If you track fuel use by distance, remember that the number is specific to your machine, load, riding style, and conditions. A passenger, a packed cargo box, muddy ground, or frequent low-speed maneuvers can change the result. For a new route or an unfamiliar machine, plan more cautiously than your best-case log suggests. The point is not to find a perfect number; it is to know your likely range well enough to build a sensible margin.
Set a turnaround point before you ride
A safe fuel plan includes a point where you stop exploring and head back. If the ride is taking longer, the route is rougher, or the fuel gauge is dropping faster than expected, turn around while you still have a comfortable margin. Waiting until the gauge looks nearly empty can leave you with fewer choices, especially when the return route includes a long climb or a slow, technical section.
Make the turnaround rule specific enough to follow when you are tired or caught up in the scenery. For example, decide in advance that the group will head back when it reaches a certain fuel level, a planned junction, or a set point in the day’s route. Share that rule with everyone riding. It can be tempting to press on toward one more overlook, but a clear limit helps avoid a stressful walk or a rescue request later.
Build a Route Plan Around Fuel Access
Treat trail fuel as unavailable unless you confirm otherwise
Do not assume a trail, campground, or remote recreation area has fuel simply because it appears on a map. Pumps and shops may be in a nearby town rather than at the riding area, and services can change or have limited operating hours. Before leaving home, identify likely places to refuel and confirm that they are accessible for your machine or tow vehicle. If you are riding near Ouray, Lake City, Gunnison, or Grand Junction, check the services in the town you will actually pass through rather than assuming a neighboring community is a convenient stop.
A route that begins near a service point can still become a long day if you add side trails, stop for lunch, or wait for a group member. Mark your start point, planned loop, likely return time, and any confirmed fuel stops. For help assembling the broader route plan, see [Planning a Colorado Riding Trip]. The route should make sense both on the map and in the real world: a fuel stop is only useful if you can reach it without leaving the group or depending on an unconfirmed road connection.
Check the trail network and closure information
A planned loop may be longer than it appears if a gate or seasonal closure forces a detour. Check current route information before you set out, and pay close attention to seasonal dates, vehicle-width restrictions, and which roads are open to motorized use. A motor vehicle use map can help you distinguish authorized routes from nearby roads or trails that are not open to your machine. See [Reading a Colorado Motor Vehicle Use Map] when you are sorting out route details.
Mapping apps can make it easier to view connected roads and save a planned route, but treat them as a planning aid rather than a substitute for posted signs and land-manager information. Riders sometimes use onX Offroad to organize routes and keep track of junctions, particularly where several roads branch through a large riding area. Download the information you need before entering a place with weak service, and be prepared to follow local signs if they differ from a saved route.
Allow for distance, elevation, and time
Mileage alone does not tell you how much fuel a Colorado ride will use. A short route over steep, rocky ground may take more fuel and more time than a longer route on smoother terrain. High elevation can also affect how a machine performs, with the specific effect depending on the engine and setup. If you are new to riding in the mountains, use a conservative pace and avoid planning a day that leaves no time for a slower-than-expected climb or a mechanical stop.
For each route, note the elevation changes, likely riding speed, and any sections where turning around could be difficult. A long descent may seem easy on fuel, but the return climb can be demanding. On routes such as the Alpine Loop, the distance between towns can be less important than the grade, surface, and time spent moving slowly. [Fueling Up Before a High Pass] offers a useful companion topic for thinking through a high-elevation day.
| Planning factor | Why it matters | Practical way to account for it |
|---|---|---|
| Terrain | Steep climbs and rough surfaces can increase fuel use | Use records from similar rides and add a margin |
| Load | Passengers and gear add weight | Estimate range with the machine loaded as it will be |
| Route uncertainty | Closures or wrong turns can add distance | Check route status and identify a turnaround point |
| Fuel access | Remote trails may have no pump nearby | Confirm town services before departure |
| Group pace | Stops and slower riders extend the day | Agree on a schedule and fuel-check points |
| Weather | Cold, wind, or a change in conditions can alter plans | Keep enough fuel for an early return |
Decide Whether to Carry Extra Fuel
Match your backup fuel to the actual gap
Extra fuel can provide a useful safety margin when the route is longer than your tested range, but carrying it adds weight and creates handling and storage considerations. First work out how much fuel the planned ride is likely to require, then compare that need with your machine’s practical range and the distance to a confirmed refueling point. Do not carry more than your plan calls for simply because a container fits. The right amount depends on the machine, route, and available services.
If your normal riding loop stays well within your tested range and you can refuel near the trailhead, extra fuel may not be necessary. If you are heading into a remote area, planning a long day, or riding with uncertain detours, a suitable reserve may be prudent. The reserve should remain available for unexpected circumstances rather than being treated as extra riding time. Keep your calculations conservative, especially if you are taking a machine into unfamiliar terrain or riding with a heavily loaded vehicle.
Choose safe, purpose-made containers
Use only a fuel container designed for the fuel you are carrying, and follow its instructions for filling, transport, and storage. Secure it so it cannot shift, fall, rub against hot or moving parts, or interfere with steering and passengers. Never improvise with an unapproved bottle or container. Keep fuel away from flames, sparks, exhaust heat, and enclosed passenger areas, and do not leave it where a small leak could expose people to fumes.
Before each ride, inspect the container, cap, seals, and mounting points. If you find a leak, damage, or a strong fuel odor, do not treat it as a minor nuisance; deal with the problem before riding. Consider how you will handle a spill without contaminating soil or water. A container that is secure on a smooth road may loosen over washboard or rock, so check it again after the first rough section and whenever you stop.
Keep reserve fuel separate from your normal calculation
It is easy to think of every drop you carry as usable range, but a reserve is only helpful if you still have it when plans change. Decide when you would use it—for example, if a detour, delay, or unexpected route condition puts the group’s return at risk. Check fuel before turning onto a new section rather than waiting until the end of the day. If one rider is using fuel much faster than the rest, address that early and adjust the group plan.
Do not assume another rider can spare fuel. Their machine may have a smaller tank, a longer route home, or a different rate of consumption. The same applies to a companion vehicle waiting at a trailhead: unless a transfer plan is safe and permitted, it is not a dependable substitute for a properly planned ride. Use [What to Carry Over a High Pass] to think through fuel alongside other essentials, while keeping your machine’s specific limits in mind.
Make Fuel Planning Work for a Group
Plan around the machine with the shortest range
A group should plan its route around the machine most likely to need fuel first, not the one with the biggest tank or best mileage. Ask riders to arrive with a full tank, share their approximate range, and speak up about fuel concerns before the ride begins. This matters when a group includes different machine types, older equipment, or riders who are carrying extra passengers and gear. One person’s comfortable range may not be another rider’s safe range.
Set shared check-in points where everyone can pause and compare fuel levels. If a rider is using more fuel than expected, shorten the route for everyone or divide the group only if there is a clear, safe plan to regroup. Leaving someone behind to find fuel can create a new problem, particularly where cell service is unreliable. In remote parts of the San Juan Mountains, a saved route and a clear meeting plan are more useful than assuming a call or text will go through. See [Cell Dead Zones in the San Juans] for more on preparing for limited connectivity.
Agree on stops before setting off
A trail day often includes more than riding: photos, lunch, navigation checks, and helping someone through a difficult section all take time. Agree on when the group will pause to check fuel and how long the planned ride is meant to last. If the group has different comfort levels or experience, build in extra time rather than expecting everyone to maintain the fastest rider’s pace. A relaxed stop at a safe turnout is better than a rushed decision on a narrow or exposed section.
Designate a lead rider and a sweep rider where the group size and route call for it. The lead can watch for junctions and changing conditions, while the sweep helps ensure no one is left behind. Neither role replaces each rider’s responsibility to monitor fuel. If someone wants to take a side route, the group should agree on the plan and its effect on the return time before splitting up. A quick discussion at the trailhead can prevent a confusing search later.
Keep the plan flexible when conditions change
A fuel plan is a starting point, not a promise to complete the route at all costs. Turn around or shorten the day if a machine develops a problem, weather worsens, a road is closed, or the group is using fuel faster than expected. Colorado mountain conditions can shift quickly, and a long ride may take longer if the route is rough, crowded, or affected by weather. Check [Colorado Trail Conditions Reports] before departure, then continue to pay attention to signs and conditions on the ground.
Apps such as onX Offroad can be useful for saving a route and reviewing nearby junctions, but do not let a screen distract you while moving. Pause in a safe place to check it, and carry a backup way to navigate if your phone battery runs low or service disappears. A flexible plan also means being willing to skip a scenic spur. If the remaining fuel margin is uncertain, choosing the shorter route is a sensible decision, not a failed ride.
Prepare for Colorado’s High-Country Conditions
Expect your pace to change at altitude
A machine’s behavior can change at high elevation, and the steepness and surface of a route often matter as much as the altitude itself. A climb that looks straightforward on a map may require careful throttle control and low-speed progress. That slow, demanding riding can affect fuel use compared with a relaxed ride on easier terrain. Give yourself room in the plan for slower travel, particularly if you are unfamiliar with the machine or the route.
Riders can also feel the effects of altitude, sun, and exertion, even when they are not driving. Fatigue can make it harder to notice a fuel warning or make a calm decision at a junction. Plan breaks, bring water, and avoid letting a tight schedule push the group into risky choices. For broader seasonal considerations, see [Colorado's High-Altitude Riding Season]. If you are heading toward a pass, account for the uphill return before deciding how far to ride.
Check weather and seasonal access
A route that was open on a previous trip may be affected by snow, mud, maintenance, or a closure on the day you plan to ride. A change in route can add distance and fuel use, while wet or rough conditions can slow the group down. Before leaving, check the relevant land manager’s updates and posted signs. Seasonal conditions in the San Juans, Taylor Park, and the Grand Mesa can differ, so do not assume a report for one area applies to another.
Build a weather-related early-return option into your plan. Afternoon storms, poor visibility, or a sudden change in trail conditions can make continuing toward a remote section unwise. If you are delayed by weather, having a fuel margin gives you more flexibility to return by a safer route or at a more manageable pace. [Colorado Trail Conditions Reports] can help with the planning stage, but conditions may still change after you check them.
Keep navigation and emergency readiness together
Fuel is one part of being self-sufficient; navigation and communication matter too. Save your route offline where possible, carry a charged phone, and know how to identify important junctions if your map app is unavailable. Some riders use onX Offroad to store route information before leaving service, but it is still wise to have a backup map and to tell someone where you expect to ride and when you expect to return.
Before you leave, check that each machine is ready for the route and that the group knows what to do if someone runs low on fuel. A simple plan might include a shared turnaround rule, a designated meeting point, and instructions not to split up without agreement. Choose a route that matches the least experienced rider and the capabilities of the widest or least maneuverable machine in the group. Good fuel planning is not about squeezing out every mile; it is about leaving enough options to end the day safely.
Disclaimer
This article is for general informational purposes only and does not constitute professional advice. Laws, prices and regulations vary by location and change over time. Consult a qualified professional for guidance on your specific situation.
