When the major ballots, lotteries and registration windows open and close — every date read from the organiser’s own official page, with the date we checked it stamped on each entry. Events whose next window is not yet published say so plainly.
Sources last checkedAlways confirm with the organiser. Entry windows move, close early and sell out. Check the official link on each entry before making plans — this calendar is a research aid, not the source of record.
Entry lottery (general entry)
Window verified on the official page
Tokyo Marathon 2027
General (lottery) entry runs 11:00 14 August to 17:00 28 August 2026 JST, with lottery results on 18 September 2026 and fee payment 18–30 September 2026. Separate windows apply for ONE TOKYO GLOBAL members and RUN as ONE semi-elite (31 July – 13 August 2026) and charity entry (24 June – 9 July 2026).
Official source: marathon.tokyo (official entry schedule) · checked
Entry drawing (random)
Window verified on the official page
Big Sur International Marathon 2027 (25 April 2027)
The random drawing for the 2027 marathon opens 08:00 Pacific on Wednesday 19 August 2026 and runs two weeks to 2 September, with winners announced 8 September. Other distances open first-come on 10 September 2026.
Official source: bigsurmarathon.org (official registration page) · checked
Qualifier registration (Registration Week)
Window verified on the official page
Boston Marathon 2027
The B.A.A. states registration for the 2027 race takes place during Registration Week in September 2026, with exact dates to be announced. The 2027 qualifying window opened 13 September 2025 and runs through Registration Week.
Last known window: 2026 race: registration ran 8–12 September 2025, closing 17:00 ET Friday 12 September 2025.
Month-level window only — the organiser has not yet published exact 2026 Registration Week dates.
Official source: baa.org (official qualifying and registration pages) · checked
Open registration (no lottery in the current cycle)
Window verified on the official page
51st Marine Corps Marathon (2026)
Charity registration is open now, with the organiser stating the deadline to secure a bib is 31 July (year implied by the page's 2026 registration plan). General registration opened 6 April 2026 at 10:00 ET and has passed; the current registration plan contains no lottery.
Last known window: 2026 cycle: priority windows 28 October – 10 November 2025 (previous finishers, active duty, Runners Club), bundles now sold out, and general registration from 6 April 2026.
The former March entry lottery appears only on archived blog pages the organiser marks as event-year-specific — it is not part of the current registration plan, and no 2027 dates are stated. Live official domain is marinemarathon.com.
Official source: marinemarathon.com (official event page) · checked
The organiser’s official page currently states no upcoming window. The last-known window is shown exactly as the organiser published it — we never guess the next date.
Public ballot
Window not yet announced
Last known window: The ballot for the 2027 race closed 16:00 BST on Friday 1 May (page headed “2027 TCS London Marathon”), with results announced by early July.
No opening date for the next ballot is stated on the official entry page.
Official source: londonmarathonevents.co.uk (official ballot page) · checked
Entry drawing
Window not yet announced
Last known window: 2026 race: applications ran 4–25 February 2026 with the drawing held 4 March 2026 (organiser noted all dates subject to change).
Organiser statement: For the 2027 race the organiser states runners can enter the non-guaranteed drawing during the application period, with dates to be announced.
Entry lottery
Window not yet announced
Last known window: Lottery registration for the 2026 race ran 25 September to 6 November 2025, with results by email at the end of November 2025.
Organiser statement: The organiser states entries are allocated by lottery, as with all Abbott World Marathon Majors events; no recurring calendar dates are stated.
Official source: bmw-berlin-marathon.com (official lottery page) · checked
Application drawing
Window not yet announced
Last known window: 2026 race: applications closed 14:00 US Central on Tuesday 18 November (the same page dates drawing notifications 11 December 2025), so the closing year is 2025 by context.
Organiser statement: The organiser invites runners to join its e-newsletter to be notified when 2027 applications open; no dates are stated.
Official source: chicagomarathon.com (official application page) · checked
Ballot
Window not yet announced
Last known window: The ballot for the 2026 race ran 24 September to 17 October 2025 — the only dated window on the official site.
No 2027 ballot dates or recurring pattern are stated officially; third-party claims of a September 2026 window are speculation and are not repeated here.
Official source: tcssydneymarathon.com (official site) · checked
Ballot with club-priority draws
Window not yet announced
Last known window: 2026 race: Blue Number Club priority 15 September – 31 October 2025; Ultra ballot applications 17–24 September 2025; first draw and payment 25 September – 31 October 2025; international entries opened 1 October 2025.
Organiser statement: The organiser states 2027 dates “will be confirmed as soon as possible” and directs entrants to watch its official social channels for entry opening dates.
Official source: twooceansmarathon.org.za (official ultra and entries pages) · checked
Public ballot (two draws per year)
Window not yet announced
Last known window: 2026 race: the September ballot closed at midnight on Sunday 14 September and was drawn on Monday 15 September (organiser article dated 3 September 2025), with a second ballot held in January 2026.
Organiser statement: The organiser describes two ballots per year — a September ballot in addition to the general ballot in January, with unsuccessful September applicants getting another chance in January. A 2027 ballot reminder sign-up is offered; no 2027 dates are stated.
Official source: greatrun.org (official event and news pages) · checked
Running Stones lottery
Window not yet announced
Last known window: 2026 edition: ETC lottery pre-registration ran 8 January 11:00 CET to 19 January 23:59 2026 with confirmation 22 January – 4 February 2026; qualified elite runners registered 6–19 January 2026. These dated windows are elite/ETC-specific — the general Running Stones lottery calendar is not stated in dated form on accessible pages.
Organiser statement: The organiser states lottery mechanics only (runners enter with all Running Stones held on the day of the lottery); no month or season for the next draw is stated.
Registrations for the 2026 races are shown as closed; no 2027 lottery dates are published on accessible official pages.
Official source: montblanc.utmb.world (official registration conditions) · checked
These organisers’ sites block automated checks, so we publish no dates for them at all. Use the official link and confirm directly.
Open registration (sells out)
Official page could not be verified automatically
The official site blocks automated access, so no window could be verified on the checked date. Confirm directly with the organiser.
Official source: schneiderelectricparismarathon.com (official site) · checked
Open registration
Official page could not be verified automatically
greatrun.org returned HTTP 403 to automated checks on the checked date, so no window could be verified. Confirm directly with the organiser.
Capped entries with qualification
Official page could not be verified automatically
comrades.com blocks automated access (bot protection), so no window could be verified on the checked date. Confirm directly with the organiser.
Every specific date was read in plain text on the event organiser's own official page on the checked date shown against the entry. Third-party ballot trackers and blogs are never used as the source of record.
Because the organiser's official page states no upcoming window. For those events we show only the organiser's last published (closed) window — we never guess or extrapolate a date the organiser has not announced.