Running races in the Peloponnese: a month-by-month guide
The bib2bib catalog lists 45 endurance events in the Peloponnese, from May 2026 through June 2027; 44 of them clear bib2bib's indexability bar (an organiser or federation link, and a status beyond a bare discovery lead — the one exception is explained below). They span road running, trail, triathlon, swimrun, cycling and open-water swimming across five regional units: Laconia (Sparta), Arcadia (Tripoli, Vytina, Astros), Argolis (Nafplio), Messinia (Kalamata, Costa Navarino, Stoupa) and Corinthia (Lake Doxa, Loutraki, Xylokastro). September and October alone account for 27 of the 44 events — roughly six in ten — capped by the two-day whynot Legacy weekend in Nafplio and the Spartathlon's finish in Sparta. Below is what runs where and when, month by month, with a link to each race's own bib2bib page.
The racing map of the Peloponnese: five regional units, one autumn peak
The Peloponnese is a 21,549.6 km2 peninsula at the southern tip of mainland Greece; Tripoli is the seat of the modern Peloponnese Region, while the English Wikipedia's infobox separately lists Tripoli and Nafplio as the peninsula's "traditional capitals." The bib2bib catalog covers events across five of its regional units: Laconia, Arcadia, Argolis, Messinia and Corinthia.
Of the 44 indexable entries, 15 are road races, 10 triathlon, 7 trail, 6 swimrun, 4 open-water swimming and 2 cycling — a dense, multi-sport picture that goes well beyond Sparta or Mount Taygetus.
- Argolis: 12 entries, 9 of them in Nafplio, inside the same weekend
- Corinthia: 11 entries (the Frogman series, Lake Doxa, Loutraki, one brevet)
- Arcadia: 7 entries, in Tripoli, Tyros, Vytina and Astros
- Laconia: 5 entries in two towns — Sparta (4) and Georgitsi (1, same Municipality of Sparta) — from the Spartathlon to L’Étape Greece
- Messinia: 5 entries, in Costa Navarino, Kalamata, Stoupa and Kardamyli
- 4 more entries don't fit cleanly into one regional unit: two Tripoli-to-Sparta routes (one continues on to Mystras and Kalamata), one on the Arcadia-Argolis border (Artemisio), and GO Methana Open Water — Wikipedia places Methana administratively in the Islands regional unit, within the Attica region, not the Peloponnese, even though it sits geographically on the peninsula and bib2bib's catalog groups it here
Spring: Costa Navarino and the first triathlon and swimrun season (May)
The season opens in May with three events across three different regional units: a running festival in Messinia, a swimrun in Corinthia and a triathlon in Argolis.
- Messinia Challenge 2026 — 8–10 May 2026, Costa Navarino, Messinia — running festival, 1 / 5 / 10 / 21.1 km — /en/races/run-navarino-challenge-2026
- Frogman Genesis 2026 — 17 May 2026, Corinthia — Sprint swimrun — /en/races/tri-frogman-genesis-2026
- whynot legacy – Epidavros 2026 — 30–31 May 2026, Epidavros, Argolis — Standard / Sprint / Aquathlon triathlon — /en/races/tri-whynot-epidavros-2026
Summer: Methana, Lake Doxa and the first road races of autumn (June–August)
June and July bring only open-water swimming, swimrun and one short triathlon in Corinthia; August adds the season's first three road races, in Arcadia, Corinthia and Laconia.
- GO METHANA Open Water 2026 — 13 June 2026, Methana — 3 / 6 km — /en/races/ows-go-methana-2026
- FROGMAN HOME 2026 — 14 June 2026, Lake Doxa, Corinthia — Sprint swimrun — /en/races/tri-frogman-home-2026
- Lake Doxa Triathlon Sprint 2026 — 4 July 2026, Lake Doxa — Sprint triathlon — /en/races/tri-lake-doxa-triathlon-2026
- Skiritida Run — 29 August 2026, Kollines, Arcadia — 5 / 21.1 km — /en/races/run-skiritida-run-2026
- 2nd Korinthos Riviera Night Run — 30 August 2026, Corinth — 6 km — /en/races/run-korinthos-riviera-night-run-2026
- 6th Pinelopeios Dromos — 30 August 2026, Georgitsi, Laconia — 5 / 11 / 20 km — /en/races/run-pinelopeios-dromos-2026
September: Spartathlon week, around Tripoli and Sparta
September packs in 9 events across Argolis, Arcadia, Laconia, Messinia and Corinthia, topped by the Spartathlon: a 245 km ultramarathon (245.3 km to the official checkpoint 75) from Athens, finishing in Sparta, the capital of Laconia. The race's own route page describes the finish: runners are welcomed "as heroes in front of the statue of King Leonidas," with an olive wreath and a cup of water from the Evrotas River. The 2026 edition started on Saturday 26 September and finishers were still crossing the line on the evening of Sunday 27 September — it has run every September since 1983, with one exception, 2020, when it was cancelled. For entry rules and how runner selection works, see "Spartathlon for beginners: the complete guide" — /en/articles/spartathlon-beginners-guide-what-is-the-race.
The same week, Tripoli hosts three separate road races of its own and Kalamata holds its own mountain event.
- 11th Asia Minor Catastrophe Memorial Race — 12 September 2026, Nea Kios, Argolis — 0.5 / 1 / 5.5 / 11 km — /en/races/run-asia-minor-catastrophe-memorial-race-2026
- 27th Kolokotroneios Run — 13 September 2026 (Sunday), Tripoli, Areos Square — 10 km, part of the city's Fall-of-Tripolitsa commemorations — /en/races/run-kolokotroneios-run-2026
- 1st International "Nikitaras" Half Marathon — 19 September 2026, Ano Doliana–Tripoli — 21.097 km — /en/races/run-diethnis-imimarathonios-nikitaras-2026
- Tyros Sprint Triathlon 2026 — Sunday 20 September 2026, Tyros, Arcadia (the official proclamation itself describes a two-day event, 19–20 September) — 0.75 km swim / 20 km bike / 5 km run, solo or in 2–3 person teams — /en/races/tri-tyros-triathlon-2026 (Saturday 19/9's separate swim leg has its own catalog entry, outside the indexability bar as a discovery lead, pending direct confirmation)
- 1st International Double Marathon "Yiannis Kouros" — 20 September 2026, Tripoli — 84 km — /en/races/run-diethnis-diplos-marathonios-giannis-koyros-2026
- Kalamata Mountain Run — 20 September 2026, Kalamata — Kalathi Trail 25 km and Verga Race 9 km on Mount Kalathi (1,340 m), right by the sea — full detail in the mountains section below — /en/races/run-kalamata-mountain-run-2026
- Spartathlon 2026 — 26–27 September 2026, Athens to Sparta — 245 km — /en/races/run-spartathlon-2026
- 15th Didaskaleia — 27 September 2026, Athikia, Corinthia — 1 / 10 km — /en/races/run-didaskaleia-2026
- FROGMAN PRINCE 2026 — 27 September 2026, Corinthia — Sprint swimrun — /en/races/tri-frogman-prince-2026
October in Nafplio: the whynot Legacy weekend
Nafplio, on the Argolic Gulf, was the first capital of the independent Greek state in the 19th century, per Wikipedia. In the bib2bib catalog it is also the single busiest location in the Peloponnese: 9 entries, all on the same weekend, 10–11 October 2026, as part of whynot Legacy — open-water swimming on Saturday, triathlon and aquathlon on Sunday. For the full programme and what remained unconfirmed as of the 31 August check, see the separate article "whynot Legacy Nafplio 2026: races and source status" — /en/articles/whynot-legacy-nafplio-2026-guide.
- Open Water 1,500 m — Saturday 10 October 2026 — /en/races/ows-whynot-nafplio-1500m-2026
- Open Water 3,000 m — Saturday 10 October 2026 — /en/races/ows-whynot-nafplio-3000m-2026
- Kids Open Water 300 m (ages 8–14) — Saturday 10 October 2026 — /en/races/ows-whynot-nafplio-kids-300m-2026
- Adults Aquathlon (0.75 km swim / 5 km run) — Sunday 11 October 2026 — /en/races/tri-whynot-nafplio-adults-aquathlon-2026
- Junior Aquathlon (ages 6–15) — Sunday 11 October 2026 — /en/races/tri-whynot-nafplio-junior-aquathlon-2026
- Sprint Triathlon Individual (0.75 / 24 / 5 km) — Sunday 11 October 2026 — /en/races/tri-whynot-nafplio-sprint-individual-2026
- Sprint Triathlon Team Relay — Sunday 11 October 2026 — /en/races/tri-whynot-nafplio-sprint-relay-2026
- Standard Triathlon Individual (1.5 km swim / 37–38 km bike / 10 km run) — Sunday 11 October 2026 — /en/races/tri-whynot-nafplio-standard-individual-2026
- Standard Triathlon Team Relay — Sunday 11 October 2026 — /en/races/tri-whynot-nafplio-standard-relay-2026
October beyond Nafplio: Costa Navarino, Sparta and Loutraki
October has another 9 entries outside Nafplio — two of them, in Vytina and Astros, are covered below in the mountains section; the remaining 7 are here, topped by IRONMAN 70.3 Costa Navarino: scheduled for Sunday 25 October 2026, based at Costa Navarino in Messinia, and already listed "Sold Out" on the official IRONMAN page. The full weekend programme, distances and what remains TBA are covered in "IRONMAN 70.3 Greece 2026 at Costa Navarino" — /en/articles/ironman-703-greece-2026-costa-navarino.
In the same window, Tripoli and Sparta host two sister ultra-distance races built around four statues of figures from Greek history: Theodoros Kolokotronis in Tripoli (start), King Leonidas in Sparta (the 80th km), Constantine Palaiologos in Mystras, and Grigorios Dikaios (Papaflessas) in Kalamata's central square (finish), per the organiser Athanatoi's own announcement. The Run of the Immortals continues on to Kalamata (142 km), while the King Leonidas Run stops in Sparta (80 km) — both start on Saturday 24 October 2026 in Tripoli.
- Brevet "Lake Doxa – The Hard Way" — 4 October 2026, Xylokastro, Corinthia — 200 km brevet / 130 km Audax — /en/races/brevet-04-10-49
- 3rd Sparta Half Marathon — 11 October 2026, Sparta — 5 / 21.1 km — /en/races/run-sparta-half-marathon-2026
- Loutraki Ultramarathon Festival — 22–24 October 2026, Loutraki — 12h / 24h / 48h track races — /en/races/run-loutraki-ultramarathon-festival-2026
- 12th Run of the Immortals — 24–25 October 2026, Tripoli to Sparta to Mystras to Kalamata — 142 km, about +2,500 m, 24-hour cutoff — /en/races/run-run-of-the-immortals-2026
- King Leonidas Run — 24–25 October 2026, Tripoli to Sparta — 80 km — /en/races/run-king-leonidas-run-2026
- IRONMAN 70.3 Costa Navarino 2026 — Sunday 25 October 2026, Costa Navarino, Messinia — 1.9 / 90 / 21.1 km — /en/races/tri-ironman-703-greece-2026
- Spartan Trifecta World Championship 2026 — 30 October–1 November 2026, Sparta — 5 / 10 / 21 km, Sprint / Super / Beast — /en/races/run-spartan-trifecta-world-championship-2026
Trail in the mountains: Taygetus, Parnon and Mainalo
Three mountain ranges across Arcadia and Laconia-Messinia host the catalog's mountain events. Mount Taygetus is the highest mountain in the Peloponnese: Wikipedia's Peloponnese article gives its peak, Profitis Ilias, as 2,407 m in the body text, while the English Wikipedia's own Taygetus infobox gives 2,405 m — a small cross-source discrepancy also flagged in bib2bib's own trail-running guide (which cites a third figure, 2,404 m, from Greek topographic maps) — /en/articles/trail-running-greece-guide.
The official 16th Taygetos Challenge is scheduled as a two-day event, Saturday 27 and Sunday 28 March 2027, from Kardamyli in Messinia, per a Runner Magazine announcement dated 23 March 2026 — the race's own official site had not yet been updated with the detailed 2027 programme as of the 29/9/2026 check (it still showed the 2026 edition). The previous edition's distances were 5, 10, 22 and 40 km — /en/races/run-taygetos-challenge-2027. Closer to the city, the Kalamata Mountain Run (20 September 2026, see above) runs on Mount Kalathi (1,340 m), which "dominates over Kalamata and connects to Taygetus," per the event's own registration page — a more accessible entry point into the same mountain system, overlooking the Messinian Gulf. And the Tripoli-to-Sparta leg of the Run of the Immortals / King Leonidas Run runs, per the organiser's own announcement, "parallel to the ridge of Taygetus."
On Mainalo, the highest point is the peak Profitis Ilias, also known as Ostrakina, at 1,981 m — the highest point in all of Arcadia, per Wikipedia — and the range runs from southwest of Tripoli to northeast of Vytina. That is exactly where the 1st Vytina Forest Trail takes place: Sunday 11 October 2026, in Vytina, Arcadia, with two courses of 6.5 and 23 km, per the event's own registration page — /en/races/run-vytina-forest-trail-2026.
On Parnon, the highest point is the peak Megali Tourla (or Kronion) at 1,935 m, in Arcadia; the range begins near Ano Doliana in North Kynouria — where the "Nikitaras" Half Marathon starts (see above) — and offers views across all of South Kynouria, per Wikipedia. In South Kynouria, at Astros, the 2nd Thirea Run takes place: 18 October 2026, with five distances from 0.3 to 15 km — /en/races/run-thirea-run-2026.
November–December, and already on the 2027 calendar
After the autumn peak, November and December carry three more events, while four more entries are already scheduled for the first half of 2027 — beyond the Taygetos Challenge 2027 covered above in the mountains section. In total, five of the catalog's entries already concern 2027.
- FROGMAN KING 2026 — 29 November 2026, Corinthia — swimrun, 22 km / 9 km Sprint — /en/races/tri-frogman-king-2026
- Artemisio Mountain Running — 6 December 2026, Karya, Artemisio — distances to be announced per the catalog — /en/races/run-artemisio-mountain-running-2026
- 1st Mani Backyard Ultra — 12–13 December 2026, Stoupa Cultural Center, Municipality of Western Mani — 6.706 km paved loop, about +60 m per loop, per the official event page — /en/races/run-mani-backyard-ultra-2026
- 2nd Ermionida Cross Country Running — 9 January 2027, Ermioni, Argolis — six distances, from 1.3 to 18 km — /en/races/run-ermionida-cross-country-running-2027
- L'Étape Greece by Tour de France 2027 — 4 April 2027, Sparta — 140 km road cycling, +1,700 m per the official page, plus shorter 67 km and 15 km routes — /en/races/cycling-letape-greece-2027
- FROGMAN GENESIS Solo Swimrun 2027 — 16 May 2027, Fragkolimano, Corinthia — 15 km / 6.5 km — /en/races/swimrun-frogman-genesis-2027
- FROGMAN HOME Solo Swimrun 2027 — 13 June 2027, Lake Doxa, Corinthia — 17 km / 9 km — /en/races/swimrun-frogman-home-2027
Frequently asked questions
What is the busiest month for races in the Peloponnese?
October, with 18 of the catalog's 44 indexable entries — 9 of them inside one weekend in Nafplio. Together with September (9 entries), the two months cover roughly six in ten of the region's events.
Where does the Spartathlon finish?
In Sparta, the capital of Laconia, in front of the statue of King Leonidas, 245 km (245.3 km to the official checkpoint 75) from Athens, per the race's own official route page. See "Spartathlon for beginners: the complete guide" for the entry rules.
Is IRONMAN 70.3 Costa Navarino 2026 still open for entries?
No — the official IRONMAN page lists it as "Sold Out" for Sunday, 25 October 2026. See the separate article for the full weekend programme and what remains TBA.
What is whynot Legacy Nafplio?
A two-day sports weekend in Nafplio (10–11 October 2026) with three open-water swimming races on Saturday and six triathlon/aquathlon events on Sunday — 9 separate catalog entries in total, the single largest cluster at one location in the Peloponnese.
Which trail races run on Taygetus, Parnon and Mainalo?
On Taygetus (2,404–2,407 m): the Taygetos Challenge (Kardamyli, March 2027) and the Kalamata Mountain Run (Mount Kalathi, 1,340 m, September 2026). On Mainalo (1,981 m): the Vytina Forest Trail (October 2026). On Parnon (1,935 m): the Thirea Run in Astros (October 2026).
What is the difference between the Run of the Immortals and the King Leonidas Run?
Same start (Tripoli, Saturday 24 October 2026) and the same route concept through statues of historical figures, but a different finish: the Run of the Immortals continues on to Kalamata (142 km), while the King Leonidas Run stops in Sparta (80 km), per the organiser's own announcement.
Are any Peloponnese races already scheduled for 2027?
Yes, five: the Ermionida Cross Country Running (9 January), the Taygetos Challenge (27–28 March), L'Étape Greece by Tour de France in Sparta (4 April), and two Frogman swimrun races (May and June).
Where can I see every Peloponnese race on one page?
On bib2bib's own Peloponnese region filter, which lists upcoming, indexable entries with date, location and source.