Loup Loup Pass

What to Expect on Loup Loup Pass

Loup Loup Pass is a Category 3 road climb in Washington State. At 6.6 km long with a 4.14% average gradient and 273 m of net elevation gain, it sits in the approachable middle ground — not a casual spin, but well within reach for riders with a solid aerobic base. The total ascent of 326 m (versus the 273 m net gain) tells you the road isn't a clean straight-line grind; there are minor undulations that accumulate extra vertical before the summit.

Gradient Profile

The average of 4.14% masks a maximum gradient of 10.46%, meaning at least one section punches considerably harder than the overall feel of the climb suggests. Expect the road to stay manageable for the majority of its length, with one or more steeper ramps that demand a gear change and a controlled effort spike.

• Lower slopes: At a 4% average baseline, the opening kilometers should feel sustainable at a steady tempo. Resist the urge to push hard early.
• Steeper ramps: The 10.46% maximum is roughly 2.5× the average gradient. These sections are short but sharp. Riders who arrive at them already deep in their FTP will pay a price.
• Upper slopes: With no data suggesting a dramatic easing near the top, plan for the effort to remain consistent rather than anticipating a long flat runout before the summit.

Pacing Notes

At 6.6 km, Loup Loup Pass is long enough that going out too hard in the first two kilometers is a genuine mistake. A common error on moderate-average climbs like this is treating the gentle opening gradient as an invitation to push — then arriving at the steeper ramps already fatigued.

Target a power output in the 75–85% of FTP range for the sustained sections. If you're unsure where that sits for you, use the FTP estimator before your ride. When the gradient kicks toward that 10% range, hold cadence over speed — let the gears do the work rather than grinding a big ratio.

Gearing Recommendations

• Road compact (50/34) or gravel-style gearing: A 34×28 or 34×32 rear combination will keep cadence comfortable through the steeper ramps without forcing a muscular effort that blows up your legs for the rest of the ride.
• Standard double riders: A 39×25 or 39×28 is workable given the moderate average, but the 10.46% sections will require deliberate gear selection and a tempo drop.
• No need to over-gear for the descents: The 962 m start elevation and 1,235 m summit elevation represent a modest alpine profile — descending speeds will be manageable rather than extreme.

The Bottom Line

Loup Loup Pass is a well-proportioned Category 3 effort. The 4.14% average keeps it from being a slog, while the 10.46% maximum ensures it demands respect. Steady pacing from the bottom, disciplined gearing on the steep sections, and an even power output will see most trained riders to the summit without major distress. It rewards patience more than raw power.