Race guide · Pacific Northwest
Seattle to Portland (STP): Training Guide
Two-hundred-plus miles from Puget Sound to the Willamette — comfortable in two days, a genuine test in one.
The Seattle to Portland Bicycle Classic, universally called STP, is one of the largest organized long-distance rides in the United States. It covers roughly 206 miles from Seattle to Portland, Oregon, and riders choose to complete it in either one day or two. The two-day version, with an overnight roughly at the midpoint near Centralia, is very achievable for most reasonably fit recreational cyclists. The one-day version is a true <strong>double century</strong> and a serious endurance undertaking.
The terrain is friendly by long-ride standards: mostly flat to gently rolling, with the most notable climb being a punchy hill partway through, and total elevation gain that is modest for the distance. That means STP is less about climbing and more about hours in the saddle and the discipline to keep eating, drinking, and pedaling for a very long day. The event is well supported with rest stops and food, but you should still train, fuel, and pace as if you are responsible for yourself. Confirm the current year's date, route, and rest-stop details on the official site, as logistics change.
What makes it hard
- Sheer distance in one day. The single-day option is over 200 miles, which for most riders means 10 to 14 hours in motion. Time on the bike, not watts, is the limiter.
- Fueling for the long haul. Going that long means thousands of calories consumed while riding. Under-fueling is the most common reason riders fade or bonk in the final third.
- Early starts and long days. One-day riders typically roll out before dawn and chase daylight, which adds mental fatigue and demands disciplined rest-stop management.
- Contact-point comfort. Saddle soreness, hand numbness, and neck fatigue surface around hour six and worsen. Fit and position problems that are invisible on short rides become decisive here.
- Group-ride dynamics and traffic. With thousands of riders of mixed ability on open and shared roads, you must stay alert, ride predictably, and not get pulled into a pace that's too hard early.
One day or two?
The first decision shapes your whole preparation. The two-day STP splits the route into two manageable centuries (or thereabouts) with an overnight near the halfway point. It is the right choice for most first-timers and for anyone whose longest rides top out around 60–80 miles. With sensible pacing and fueling, the two-day is a satisfying, achievable goal that does not require enormous training volume.
The one-day STP is a different animal. Completing 206 miles between dawn and dusk is a genuine double century and one of the harder things a recreational cyclist can take on. It demands real endurance volume in training, a dialed fueling plan, and the comfort and pacing discipline to keep turning the pedals deep into the evening. If you have never ridden beyond about 120 miles, build toward the one-day deliberately rather than assuming you can stretch a century by another hundred miles on the day.
How to train for it
For the two-day, the core sessions are a steadily growing weekend long ride and ideally a couple of back-to-back weekends in the final month so your body knows what it feels like to ride a long day, sleep, and ride long again. Aim to have completed at least one ride near century distance, or close to it, a few weeks out. A broad base of easy zone 2 aerobic riding underpins everything; intensity is secondary for an event whose challenge is duration.
For the one-day double century, you need more volume and a longer single long ride. Build your weekend long rides past the century mark in the final six to eight weeks, with at least one ride in the 130–160 mile range to prove your fueling, comfort, and pacing under genuine fatigue. Practice riding the last hour of those rides tired and still eating, because that is the skill the event tests. Keep most of your training easy and aerobic, add a little tempo to make endurance pace feel comfortable, and protect recovery so you arrive fresh rather than overcooked. Whichever option you choose, do your long rides at the time of day you'll actually be riding, and rehearse the early start.
Pacing, fueling, and comfort on the day
Pace by feel and start easy. The classic mistake is going out hard in a fast group in the cool morning and paying for it after hour eight. Settle into a sustainable aerobic effort, take steady pulls if you ride in a group, and treat the rest stops as efficient fuel-and-go points rather than long breaks that let you stiffen up. On a long day the clock matters, so a few disciplined short stops beat several sprawling ones.
Fuel early and continuously: roughly 60–90 grams of carbohydrate per hour, a bottle roughly every hour or more depending on heat, and deliberate electrolytes, supplemented by real food at the well-stocked rest stops. For comfort, dial in your bike fit and saddle in advance and prove your kit and chamois on your longest training rides; apply chamois cream, vary your hand position to fend off numbness, and stand periodically to relieve pressure. The Pacific Northwest in July is usually temperate, but plan for a cool, possibly damp early start and the chance of warmth later, and carry layers you can shed.
A sample build
A skeleton, not a prescription — the right plan flexes around your starting fitness, your weeks, and your life. Use it to picture the shape of the work.
Common questions
How long is the Seattle to Portland (STP) ride?
STP is roughly 206 miles from Seattle to Portland, Oregon. Riders complete it in either one day or two, with the two-day option including an overnight near the midpoint. Confirm the exact distance and route on the official site, as it can vary slightly year to year.
How do you train for the one-day STP?
Treat it as a double century. Build a strong aerobic base, push your weekend long rides past 100 miles in the final weeks, and do at least one 130–160 mile ride to prove your fueling and comfort. Practice eating continuously and riding tired, and rehearse the pre-dawn start.
Is STP hard?
The two-day version is achievable for most reasonably fit recreational riders with sensible training. The one-day version is genuinely hard: over 200 miles in 10–14 hours of riding. The terrain is mostly flat to rolling, so the difficulty is duration and fueling rather than climbing.
Course distance, elevation, and dates shift year to year. Always confirm the current year's details on the official event site — Seattle to Portland (STP). This guide is general training information, not coaching advice tailored to you.
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