| 24 Hour Ultramarathons 2011 | ||||
| Mon. | Day | Cou. | Race Name | Hosts/Info |
| Jan | 8 | DEN | 2.Aarhus Indoor Run | www.duul.dk |
| Jan | 29 | FIN | Endurance 24 hr Run | [email protected] |
| Feb | 12 | USA | Beast of Burden 24/100 mile | www.winter100.com |
| Mar | 4 | USA | Rouge-Orleans 126 miles | www.rougeorleans.com |
| Mar | 18 | USA | Howard Aslinger 24/12/1 | Howardaslingerfoundation.org/ |
| Mar | 18 | USA | Run4kids Corona, CA | www.r4k24.org |
| Mar | 19 | USA | Pacific Rim One Day | Fred (360)749-4372 |
| Mar | 26 | USA | 24 Hours of Moab | Gemini Adventures |
| Apr | 9 | ITA | Torino | |
| Apr | 9 | FRA | 24 hr de Saint-Fons | www.sportnat.com |
| Apr | 9 | GRE | Athens International Ultra Festival 24 | Dayrunners.gr |
| Apr | 9 | FRA | 24 hr du Confluent | www.24heuresduconfluent.fr/ |
| Apr | 16 | USA | Virginia Cancer Relay | Peninsula track club info |
| Apr | 16 | USA | Fool Moon 24/12 | www.trailrunevents.com/ |
| Apr | 16 | GER | Seilersee 24-Stundenlauf | Seilersee 24-Stundenlauf |
| Apr | 16 | HUN | Sarvari | fussunk.gportal.hu/ |
| Apr | 16 | AUS | Coburg 24 hour Carnival | Coburg Harriers |
| Apr | 17 | USA | Lynch’s Woods 24 Hour | ultrasontrails.com/ |
| Apr | 23 | FRA | 6/12/ 24 heures de Rennes | www.coureursdextreme.free.fr |
| Apr | 24 | FRA | Les 24 heures de Brive | www.24h-brive.fr/ |
| Apr | 24 | FRA | 24 Heures de Sene | 24hsene.free.fr/ |
| Apr | 30 | USA | Cornbelt 24 hour | Cornbelt.org |
| May | 6 | USA | The CAPE Relay | 13relay.com |
| May | 7 | CHE | Self-Transcendence 24 Basle | S.C.M.T. |
| May | 7 | BRA | II Ultramaratona 24hs De Resistência | www.ucrsm.com/ |
| May | 7 | FRA | 24 Heures D’eppeville | [email protected] |
| May | 7 | USA | 24Hour Adventure Run | Athletic Equation |
| May | 13 | USA | 3 Days at the Fair 48/24/12/6 | 3 Days at the Fair |
| May | 14 | FRA | 24 Heures De Peynier | 24 Heures De Peynier |
| May | 14 | RUS | 24H championship of Russia | www.parsec-club.ru / |
| May | 14 | NLD | 24h de van Steenbergen | Ultraloopsteenbergen.nl/ |
| May | 14 | GBR | Kent 24 Hour Challenge | www.50milechallenge.co.uk/ |
| May | 21 | FRA | 24h De L’INSA Villeurbanne | www.24heures.org |
| May | 21 | FRA | 24 heures de Yvelines | jlgarcia.2xlpromosport.fr or ultrapassion.fr/ |
| May | 28 | USA | Nanny Goat 24-Hour Trail | Oldgoatrunners.com |
| May | 28 | FRA | Roche la Moliere | clips-rlm.com |
| May | 28 | FRA | 24 heures de Peynier | psn.over-blog.com |
| May | 29 | CAN | Easter Seals 24 Hour Relay, Vancouver Island | www.24hourrelay.com/ |
| Jun | 4 | GER | Hoyerswerda 24h Europalauf Not in 2010 | www.hoyerswerda-marathon.de |
| Jun | 4 | CAN | Vancouver Island | 24hourrelay.com/ |
| Jun | 5 | USA | FANS 24 hour | FANS |
| Jun | 11 | SRB | Palic 24/12/6 Hour & 100 km | www.usspalic.org |
| Jun | 11 | DEN | Puma 24h Run Holte | www.24run.dk/ |
| Jun | 5-11 | FRA | 48 heures of Antibes | www.6jours-antibes.fr/ |
| Jun | 11 | FRA | 24 heures of Antibes | www.6jours-antibes.fr/ |
| Jun | 11 | CAN | Easter Seals 24 Hour Relay, Okanagan | www.24hourrelay.com/ |
| Jun | 11 | GER | Burginsellauf Delmenhorst | Burginsellauf Delmenhorst (GER) |
| Jun | 18 | DNK | Ultramarathon Bornholm | Ultramarathon.dk |
| Jun | 18 | CAN | Easter Seals 24 Hour Relay, Vancouver | www.24hourrelay.com/ |
| Jun | 18 | AUS | 24 Hour Festival of Running | Sri Chinmoy Races |
| Jun | 25 | FRA | 24 heures de Puttelange | www.pour-quentin.com |
| Jun | 25 | USA | 24 Hours of Laramie | Gemini Adventures |
| Jun | 25 | GER | Stadtoldendorfer 24 | 24-stunden-lauf.de |
| Jun | 25 | FRA | 24 hr de l’Echo-du Pas-de-Calais | www.echo62.com/course |
| Jul | 8 | AUT | 24 hr Wörschach | www.24stundenlauf.at/ |
| Jul | 9 | SWE | Trollhattan 12/24 | www.marathon.se |
| Jul | 16 | GER | Self-Transcendence 24/12 hour Berlin | Sri Chinmoy Races |
| Jul | 16 | USA | Lone Ranger 24 hr | www.20in24.com/ |
| Jul | 16 | USA | Cool Moon 12/24 Hour Runs | www.ultrarunner.net/raceseries/coolmoon24hr.html |
| Jul | 22 | GBR | Energia Belfast 24 Hour | www.ultrarunningireland.com |
| Jul | 23 | GER | 24-Stundenlauf Reichenbach | 24-stundenlauf.de |
| Jul | 29 | CZR | Self Transcendence 24/48 | Sri Chinmoy Races |
| Jul | 29 | USA | 24 Hour Around The Lake | Somerville R.R. |
| Jul | 29 | AUS | Caboolture 24/ 48 hour | www.aura.asn.au/ |
| Jul | 30 | GBR | Adidas Thunder Run | www.tr24.co.uk |
| Aug | 6 | CAN | Dirty girls 6/12/24 Hr Trail | Dirtygirlsrun |
| Aug | 10 | FRA | Les 24 heures du Quai du Cher | www.couc100km.free.fr |
| Aug | 26 | USA | Colorado Outward Bound 24 | Outward Bound Relay |
| Agu | 27 | GER | Runinger 24-Stundenlauf | www.lauftreff-rueninger-roadrunner.de/ |
| Sep | 3 | GER | 24h Lauf Wolfenbüttel | www.sporttrend.net/ |
| Sep | 3 | SCO | Glenmore 24/12 Trail Run | www.glenmore24.com |
| Sep | 3 | USA | Woods Ferry | Ultrasontrails.com |
| Sep | 3 | RUS | St.Petersburg 24 Hour | www.spb-la.ru/index.php |
| Sep | 3 | GER | 24-Stundenlauf Fleested | www.24stundenlauf.info/ |
| Sep | 3 | USA | Badgerland F/x 24 Hour | Badgerlandstriders.org/ |
| Sep | 10 | GER | 24 Stunden von Bernau | 24 Stunden von Bernau |
| Sep | 17 | GBR | Self-Transcendence 24 Tooting Bec | Sri Chinmoy Races |
| Sep | 17 | BEL | Les 24 heures de Liege | les24h.be |
| Sep | 17 | FRA | 24 hr de St Maixent l’Ecole | Spiridon Poitou Charente |
| Sep | 17 | USA | San Francisco One Day | pctrailruns.com |
| Sep | 17 | USA | North Coast 24 | North Coast 24 |
| Sep | 23 | WAL | Commonwealth Ultras | www.cumbriacommonwealthchampionships.org/ |
| Sep | 24 | CAN | Self-Transcendence 24 | Sri Chinmoy Races |
| Sep | 24 | CHE | 24/12 Stundenlauf Aare-Insel Brugg | www.24stundenlauf.ch/ |
| Sep | 25 | USA | Hinson Lake 24 Hr | Mangum T.C. |
| Oct | 1 | FRA | 24 Heures De Grenoble | http://guc.athle.com |
| Oct | 15 | FRA | 24 hours of Royan | 100km.iroyan.com/ |
| Oct | 15 | USA | St. Pats | www.stpats24hour.com/ |
| Oct | 17 | USA | 24 Hours of Boulder | Gemini Adventures |
| Oct | 22 | USA | 24Hours the Hard Way | 24thehardway.com/ |
| Nov | 6 | FRA | 24 heures d’Aulnat | 24 heures d’Aulnat |
| Nov | 26 | ITA | 24 Ore Del Sole | www.asdmol.it/ |
| Nov | 26 | BRA | 24 Horas Campinas Run | www.ultrarunnereventos.net/ |
| Nov | 26 | GER | Eis Age Bad Berleberg | www.lg-wittgenstein.com/ |
| Nov | 26 | NOR | Bislett | www.spiridon.no/ |
| Nov | 26 | USA | New Years One Day | www.coastaltrailruns.com/ |
Updated: 01/02/2011
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