How Foreigners Can Register for Korea’s Big 3 Marathons: Seoul, JTBC & Daegu (2027 Registration Windows & Tips)

Every winter, the same email lands in my inbox: “I’m coming to Seoul in the spring and I want to run a marathon. Where do I sign up?” The honest answer is that Korea does not have one entry system — it has three completely different ones, and the biggest mistake foreign runners make is treating the Seoul Marathon like the Berlin Marathon. It isn’t. Seoul runs a separate overseas channel from its domestic one, that channel is priced in dollars, and the full course quietly requires a qualifying record that most visitors discover after they have paid.

This guide is the version I wish I had been handed: the three races that matter for a visitor, the actual numbers from the 2026 editions, and the exact windows for 2027 — including one deadline that is fifteen days away as I write this.

⚡ Jump to Final Summary

The three races side by side

These are the three Korean races an international runner should know. Everything below comes from the organisers’ own pages and the 2026 race results, checked on 15 November 2026 — but entry dates move every year, so treat the 2027 column as the window to verify, not a promise.

The pattern is worth reading twice. Seoul sells two products to two markets: a cheap domestic entry with a hard sporting standard, and a more expensive overseas entry with the same standard but a separate quota. Daegu sells one product to everyone, cheaply, and simply runs out. JTBC sells one product to everyone and puts its whole field on a mobile app.

Seoul Marathon: the overseas door and the record trap

Seoul is the race with a history — it descends from the 1931 Dong-A Marathon, holds a World Athletics Platinum Label, and in 2026 put 40,000 people on the road from Gwanghwamun to Jamsil Olympic Stadium. It is also the only one of the three with a genuine English-language overseas channel, which is why I send every visitor here first.

The overseas window. Registration for the 2027 race opened on 1 September 2026 at 10:00 KST and is first-come, first-served, with no second round. You register through the Dongma Club English page (the organiser’s own platform), or through one of the two resellers the organiser lists — World’s Marathons, which prices in euros (€135 for the marathon, €90 for the 10K at the time of writing), and Japan’s RUNNET. Prices differ slightly by channel; the entry, not the channel, is what matters.

The record trap. The full course is not open to everyone. You need an official full-marathon finish of 4:59:59 or faster (net time) from a race held between 1 January 2024 and 30 November 2026, submitted with your name and passport number through the “Marathon Record Submission” form on Dongma Club. The submission window for the 2027 race is 1 October – 30 November 2026, closing at 14:00 KST on the last day. Miss it and the organiser can cancel an entry you have already paid for. Half-marathon and 10K personal bests do not count, and neither does a GPS file: they want a race certificate that shows the race name, the distance, your name and the date.

Your certificate also decides where you start. Seoul assigns A to H groups by submitted record — A covers 2:00:35 to 3:11:59, and H covers 4:21:00 to 4:59:59. You may drop back to a slower group on race morning, but starting forward of your group risks disqualification. In practice, a 4:30 marathoner starts in the last corral, behind several thousand people, and the first kilometre costs you two minutes. Plan your target time around that, not around your watch.

The 10K is the loophole. No record, no certificate, no group stress: the 10K at Seoul is open to any healthy adult, starts and finishes at Jamsil Olympic Stadium, and has a 1:30 cut-off. If you are visiting in March and simply want the Seoul Marathon experience without the paperwork, this is the honest way in.

The Korean door for 2027 is already shut — and that matters. Residents registered months ago: record submission ran 28 April – 11 May 2026, priority entry 18–22 May, and the main first-come window 1–3 June 2026, with the 10K on 3 June. So “ask a Korean friend to enter me” does not work for this edition; the only door still open to anybody is the overseas one. Note also that the overseas record period runs to 30 November 2026, seven months later than the domestic cut-off of 10 May 2026 — a race you ran in September 2026 counts for the overseas entry and would not have counted for the domestic one.

The dates you can still act on. Refunds for the 2027 race close on 18 December 2026 at 17:00 KST on the organiser’s English page (third-party resellers advertise an earlier cut-off, 30 November 2026, so if you are buying through a reseller, read its own terms). Race packs are not shipped and cannot be collected on race morning: you pick up your bib in person at the Seoul Marathon Expo in Seoul before race day — the 2027 guide points to Dongdaemun Design Plaza (DDP). Book your flight to arrive at least two days early.

One last thing that surprises people: Seoul does not issue visa invitation letters. If you need a visa, plan your application around your own documents and an ordinary tourist itinerary, not around the race.

JTBC Seoul Marathon: the autumn city party

JTBC’s race is the one that feels like a festival rather than a championship. The 2026 edition ran on 1 November 2026, with the full course starting at Sangam World Cup Park and finishing at Olympic Park, and the 10K starting and finishing at Yeouido Park — 32,000 runners in the first week of November, which in Seoul usually means 8–15°C and perfect racing weather.

Entry is not a form on a website. It goes through Runable (runable.me), a Korean race platform used as an app and a web page, and the interface is built for Korean residents: Korean-language screens, Korean phone verification, Korean card payment. Foreigners do enter — I have friends from Japan and Taiwan who run it every year — but expect to do it with a Korean friend’s help or a translation app, and expect to pay ₩150,000 for the full and ₩100,000 for the 10K (2026 prices). That is more than double the Seoul Marathon’s price, and it is the price of the date and the route, not of the medal.

The 2027 date had not been announced when I checked on 15 November 2026. The pattern to watch is this: the race runs in the first days of November, and entry opens a few months out. My advice is to set a reminder for August 2027 and check both marathon.jtbc.com and Runable, because JTBC fills without much warning and does not run a separate overseas quota. If you want a Korean autumn marathon with a big-city finish, this is it; if you want a guaranteed, English-language booking from abroad, Seoul in March is still the safer bet.

Daegu Marathon: the cheapest, coldest, fastest sell-out

Daegu is the value race. The 2026 edition — the 25th — took place on 22 February 2026 and drew 41,104 masters runners from 37 countries, with a full marathon entry at around ₩80,000, a 10K at ₩50,000 and a 5K health run at ₩30,000. It holds a World Athletics Gold Label, its course is famously flat, and February in Daegu is cold but dry: near-perfect running weather, if you can handle a 0–8°C start.

The catch is supply. Registration for the 2026 race opened on 17 September 2025 and closed on 8 October 2025 — 21 days, with the 10K gone on day one and the 5K in three days. The 2025 edition had taken 81 days to sell out; the 2026 race took less than a quarter of that. For 2027 the general entry has already been and gone, and what is left on the official portal as I write is a group-entry window (16–19 November 2026) and the refund queue — which matters, because cancelled places are re-released, and the organiser ran a second additional-entry round in late October 2026.

The 2027 race itself is worth knowing even if you cannot enter: 28 February 2027, 08:00, from Gukchaebosang Park in central Daegu — a new start area, closer to the city’s hotels and the Dongdaegu KTX station than the old stadium start. If you want Daegu in 2028, the lesson is simple: watch the official site from early September, register on the first morning, and do not wait for an English announcement, because there usually isn’t one.

Why foreigners and Koreans use different doors

This is the part that wastes the most time for visitors, so here it is plainly. Korean race registration is built around 본인인증 — identity verification through a Korean mobile carrier, or an i-PIN. Without a Korean phone number in your name, the domestic form will stop you before payment. The payment page is the second wall: domestic checkout runs on Korean payment gateways that often reject foreign-issued cards outright, or demand a Korean-format address.

Seoul’s organisers solved this by building a parallel overseas product: an English page, dollar pricing, passport-based identity, and a record-submission form that accepts foreign race certificates. That is why the overseas entry costs USD 150 while a Korean resident pays ₩100,000 (roughly USD 70). You are not being overcharged for the same thing — you are buying a different product, with an English support desk and a passport-based identity check.

JTBC and Daegu have not built that product. They accept foreign runners inside the Korean system, which works if you have a Korean phone number or a friend who does, and is painful if you do not. If you are visiting from abroad and want the least friction, the ranking is: Seoul overseas channel → Seoul 10K → JTBC with local help → Daegu with local help.

What the “one-minute sell-out” actually looks like

Korean runners talk about 1분 컷 — “cut in one minute” — and they are not exaggerating. Domestic windows for popular races open at a fixed time, usually 19:00 or 21:00 KST, and the Seoul Marathon spreads them across a week by record group (A group on Monday evening, G group on Thursday, the 10K on Friday). Within a minute of opening, the good groups are full.

Domestic runners prepare for this the way people prepare for concert tickets: they log in days early, check their group assignment, pre-register their card, and they sync to Naver time rather than their phone’s clock, because the server opens on Naver’s clock and a phone that is three seconds fast will fire a request into a closed door. (The old tool for this was a site called Navyism; the habit survives it.) They also use PC and mobile simultaneously, because the mobile queue and PC queue are separate.

As a foreign entrant you mostly avoid this — the overseas channel is first-come but not one-minute-first-come, and it stays open for months. The exception is JTBC and Daegu, where you are in the domestic queue with everyone else. If that is your plan, do not attempt it from a phone at a café table: use a wired connection, have your Korean helper logged in beforehand, and accept that the odds are long.

Card declines, 3-D Secure and other payment traps

A few practical things that cost my readers money or entries:

• Use a card that handles 3-D Secure. Korean gateways push a verification step; cards without it, and some virtual cards, fail at the last screen. If your bank app needs approval, have your phone in your hand.
• Pay in the currency shown. On reseller sites you may be offered your home currency; the conversion is usually 2–4% worse than letting your card network do it.
• Keep the confirmation email and a screenshot of the payment page. When something goes wrong between payment and entry confirmation, the organiser asks for an order number, not your name.
• Check the name. It must match your passport exactly, including middle names, because the bib is issued against your passport at the expo. Fixing a name after payment means emailing the organiser in Korean.
• Do not pay twice. If the page errors after payment, check your card app and the entry status page before trying again; duplicate payments are refunded slowly and sometimes not at all before race day.

The 10-step entry checklist for 2027

1. Decide the race by its date, not its reputation. March in Seoul is 0–10°C and dry; early November is 8–15°C and the best racing weather of the Korean year; late February in Daegu is cold and windy but fast.
2. Check your qualifying record first. If you have no full marathon inside 5 hours since 1 January 2024, enter the 10K at Seoul or choose Daegu, and stop reading the full-course section.
3. Download your race certificate now. It must show your name, the race, the 42.195 km distance, the date and a net time. A screenshot of a results page is usually accepted; a Strava link is not.
4. Register on the Dongma Club English page with the name exactly as printed in your passport, and pay the USD 150 (or USD 100 for the 10K).
5. Submit the record through the Marathon Record Submission form before 30 November 2026, 14:00 KST, and save the confirmation screen.
6. Book the flight for the Thursday or Friday before the race. Bib collection is in person at the expo and closes before race morning.
7. Book a hotel within two subway stops of Gwanghwamun (Jonggak, Euljiro, Seoul Station). On race morning the roads close from 05:00 and the first trains are packed.
8. Set your start group expectation. Your certificate decides the corral; do not plan a personal best from the last group.
9. Train for the course, not the distance. Seoul is flat for 30 km and then rolls through Jamsil; the last 5 km have two gentle rises that feel enormous at 3:30.
10. Re-check the official page a week before. Start times, expo hours and refund dates change, and the English page is updated later than the Korean one.

Race week: bibs, subway and the 5-hour cut-off

Seoul’s race morning is a subway morning. The 2026 race started at 07:30 from Gwanghwamun, with a 06:30 assembly; the first trains on Line 5 reach Gwanghwamun just after 05:30 and are standing-room only. Bring a throwaway layer for the corral — it is 2°C at 06:00 in March and 9°C by 10:00 — and use the baggage trucks, which are organised by bib number and are reliable.

The cut-off is real: five hours from the gun for the full, 1:30 for the 10K. Korea’s races are strict about it and the sweep bus is not a rumour. Aid stations are every 5 km after the first 5 km, with water, sports drink and — this is Korea — sponges, bananas and, at some stations, rice cakes. There are no gels handed out, so carry your own.

And a note for the 10K runners at Jamsil: your start and finish are both at the Olympic Stadium, which means one subway ride in, no baggage truck stress, and the fastest possible route back to a hotel shower. It is the most efficient race morning in the country.

FAQ from first-time foreign entrants

Last checked: 15 November 2026. Sources: en.seoul-marathon.com overseas registration and record-submission pages; the 2026 Seoul Marathon notice (40,000 runners, 07:30 start, 6,424 foreign entrants); JTBC Seoul Marathon 2026 official race page (1 November 2026, 32,000 runners, ₩150,000/₩100,000); Daegu Marathon official site (2027 date 28 February, 08:00, Gukchaebosang Park; 2026 edition 41,104 masters from 37 countries; 21-day sell-out reported by Daegu Ilbo). Fees, dates and refund cut-offs change every edition — confirm on the organiser’s page before you pay.