Seattle to Portland (STP) course preview
The 2026 Seattle to Portland (STP) course is 206.8 mi (332.8 km), with 4,763 ft of climbing. RideMorrow finds 14 distinct climbs and 11 descents; the listed climbs account for 35% of the total ascent, and the rest comes from shorter rollers. The hardest climb by FIETS score starts at 43.9 mi: 1.12 mi at an average 5.3%, peaking at 11.1% over 100 m. The third quarter holds the most climbing (32%).
- Distance
- 206.8 mi332.8 km
- Elevation gain
- 4,763 ft1,452 m
- Climbs
- 1411 descents
- Steepest 100 m
- 11.1%On a listed climb
- Corners
- 17944 technical
- High point
- 464 ftLow 8 ft
Elevation profile
Shaded: every listed climb. Numbered: the hardest.The 5 hardest climbs
Ranked by FIETS score- 1Climb 4 · from 43.9 mi1.12 mi · 312 ft up · 5.3% average, 11.1% steepest0.5
- 2Climb 3 · from 10.5 mi0.53 mi · 144 ft up · 5.1% average, 8.5% steepest0.2
- 3Climb 8 · from 114.8 mi0.94 mi · 198 ft up · 4.0% average, 10.0% steepest0.2
- 4Climb 1 · from 2.6 mi0.57 mi · 84 ft up · 2.8% average, 4.4% steepest0.1
- 5Climb 2 · from 3.7 mi0.71 mi · 108 ft up · 2.9% average, 6.3% steepest0.1
Every climb, in ride order
14 climbs · top 5 highlighted| Climb | Starts at | Length | Elevation gain | Avg grade | Steepest 100 m | FIETS |
|---|---|---|---|---|---|---|
| 1 | 2.6 mi | 0.57 mi | 84 ft | 2.8% | 4.4% | 0.1 |
| 2 | 3.7 mi | 0.71 mi | 108 ft | 2.9% | 6.3% | 0.1 |
| 3 | 10.5 mi | 0.53 mi | 144 ft | 5.1% | 8.5% | 0.2 |
| 4 | 43.9 mi | 1.12 mi | 312 ft | 5.3% | 11.1% | 0.5 |
| 5 | 45.6 mi | 0.39 mi | 69 ft | 3.3% | 5.8% | 0.1 |
| 6 | 72.5 mi | 0.29 mi | 71 ft | 4.6% | 8.3% | 0.1 |
| 7 | 93.7 mi | 0.42 mi | 71 ft | 3.2% | 4.3% | 0.1 |
| 8 | 114.8 mi | 0.94 mi | 198 ft | 4.0% | 10.0% | 0.2 |
| 9 | 129.3 mi | 0.86 mi | 147 ft | 3.2% | 6.8% | 0.1 |
| 10 | 135.4 mi | 0.51 mi | 90 ft | 3.3% | 6.9% | 0.1 |
| 11 | 136.2 mi | 0.64 mi | 125 ft | 3.7% | 6.3% | 0.1 |
| 12 | 140.8 mi | 0.58 mi | 102 ft | 3.4% | 8.5% | 0.1 |
| 13 | 158.0 mi | 0.55 mi | 77 ft | 2.6% | 7.3% | 0.1 |
| 14 | 197.3 mi | 0.37 mi | 87 ft | 4.4% | 5.4% | 0.1 |
Descents
11 descents drop 1,178 ft in total. The steepest:
- Descent 10 · from 155.2 mi 0.28 mi at 6.6% average, 25.1% at its steepest
- Descent 6 · from 94.2 mi 0.47 mi at 4.0% average, 9.4% at its steepest
- Descent 2 · from 4.5 mi 0.34 mi at 6.0% average, 8.7% at its steepest
- Descent 5 · from 51.1 mi 0.22 mi at 5.7% average, 8.5% at its steepest
- Descent 3 · from 5.1 mi 0.29 mi at 4.4% average, 8.4% at its steepest
Corners
179 corners detected from the course geometry, 10 of them on a descent.
- 7 Very technical
- 37 Technical
- 73 Moderate
- 62 Gentle
Technical corners on descents
- 1.0 mi 86° right turn on a 4.4% approach · Technical
- 1.4 mi 46° right bend on a 3.8% approach · Technical
- 3.3 mi 36° left bend on a 4.1% approach · Technical
- 3.4 mi 73° right bend on a 8.1% approach · Very technical
- 4.6 mi 45° right bend on a 6.8% approach · Technical
- 4.7 mi 136° right turn on a 9.0% approach · Very technical
Corners describe the line on the map, not road conditions. Sightlines, grip and traffic aren't known.
Seattle to Portland (STP) course FAQ
How much climbing is in the Seattle to Portland (STP)?
4,763 ft (1,452 m) over 206.8 mi, measured from the organizer's course file with the elevation smoothed and small fluctuations ignored. Other tools may show a different total because they count every small rise.
How many climbs does the Seattle to Portland (STP) have?
14 climbs of at least 300 m with 20 m of elevation change and a 2% average grade, plus shorter rollers. Together the listed climbs gain 1,686 ft.
What is the hardest climb in the Seattle to Portland (STP)?
Climb 4, starting at 43.9 mi: 1.12 mi gaining 312 ft at an average 5.3%. Its FIETS score is 0.5.
What is the longest climb in the Seattle to Portland (STP)?
Climb 4, 1.12 mi from 43.9 mi, averaging 5.3%.
How steep does the Seattle to Portland (STP) get?
The steepest 100 m on a listed climb averages 11.1%. Grades are measured over 100 m, so short ramps can be steeper.
Where does this course data come from?
From the course Cascade Bicycle Club publishes on its official site (https://cascade.org/rides-events/seattle-portland-2026/route), retrieved 2026-10-12. Organizers change courses, so check their site before the event.
Source and method
Course: Seattle to Portland (STP) 2026, published by Cascade Bicycle Club. Retrieved 2026-10-12. RideMorrow is not affiliated with the event. Organizers change courses, so check the official site before the event.
Elevation comes from the route file, resampled every 10 m and smoothed. Climbs and descents need at least 300 m of length, 20 m of elevation change and a 2% average grade. Grades are measured over 100 m. Climbs are ranked by FIETS score: height² ÷ (length × 10), both in metres, without the index's high-altitude bonus. A score of 1 is a solid climb; 5 and above is a mountain pass. Weather, surface conditions, traffic and closures are not included.
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