[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fbQnyFF5A4FkGC0TprIUBbaDVH8DqmENz5X9C6wu61NA":-1,"feature-flags":3,"$ft6cvKCyzLFJWxBqaAKccj93-SK21ESL-bUiSe2BQiAM":5},{"homepage_proof_v2":4,"homepage_hero_cta_v2":4,"welcome_immediate_v1":4,"lifecycle_events_v1":4,"funnel_tracking_v1":4,"activation_reward_v1":4,"promo_codes_v1":4,"referral_v1":4,"pro_signup_bonus_v1":4,"pro_space_v1":4,"trial_express_v1":4,"microscope_v1":4,"login_page_v2":4,"signup_magic_reminder_v1":4,"first_session_48h_v1":4,"onboarding_purge_v1":4,"runner_profile_v1":4},true,{"permalink":6,"name":7,"startDate":8,"endDate":9,"country":10,"countryIso":11,"city":12,"location":12,"disciplines":13,"distances":15,"participantsEstimate":9,"bigEventFlag":17,"featured":17,"websiteUrl":18,"registrationUrl":19,"registrationOpenDate":9,"registrationOpenTime":9,"registrationCloseDate":9,"registrationOpenUrl":9,"registrationOpenStatus":9,"description":20,"descriptionLocale":21,"availableLocales":22,"screenshotUrl":9,"department":9,"departmentSlug":9,"distanceHubs":23,"usDistanceHubs":24,"state":9,"regionHub":9,"hasFiche":4,"isRunning":4,"duplicateOfPermalink":9,"isPast":17,"nextEditionPermalink":9,"region":9,"geo":25,"edition":28,"tags":30,"races":31,"nearby":34},"trails-tarmac-back-yard-ultra-winter","Trails & Tarmac Back Yard Ultra - Winter","2027-02-06",null,"Royaume-Uni","GB","Llangattock",[14],"Course",[16],"1 h",false,"http:\u002F\u002Fwww.limitlesstrails.co.uk\u002F","https:\u002F\u002Fworldsmarathons.com\u002Fmarathon\u002Ftrails-tarmac-back-yard-ultra\u002Fregister?ref=Wo2X9tu","\u003Cp>\u003Cstrong>Trails & Tarmac Back Yard Ultra - Winter\u003C\u002Fstrong> se tient le 6 février 2027 à Llangattock, au pays de Galles, au Royaume-Uni. L'épreuve suit le principe du backyard ultra : une boucle de 4,167 miles, soit environ 6,7 km, à répéter au début de chaque heure jusqu'à ce qu'il ne reste qu'un coureur en lice. Ni l'heure de départ ni une distance totale ne sont renseignées, ce qui est cohérent avec un format sans limite fixée à l'avance.\u003C\u002Fp>\u003Cp>Ce type de course se joue moins sur la vitesse que sur la discipline : boucler chaque tour en 45 à 50 minutes laisse le temps de manger, de se changer et de souffler, et c'est cette marge qui détermine la durée de survie dans l'épreuve. La préparation passe donc autant par des simulations de boucles répétées que par des sorties longues classiques. En février, la nuit tombe tôt : éclairage, vêtements de rechange et base logistique organisée sont indispensables.\u003C\u002Fp>","fr",[21],[],[],{"lat":26,"lng":27},51.856479,-3.13551,{"year":29,"number":9,"firstYear":9},2027,[],[32],{"name":33,"distanceFormatted":9,"distanceMeters":9,"discipline":9,"elevationGain":9,"itraPoints":9,"date":8,"time":9,"lastEditionFinisherCount":9},"Backyard Ultra (4.167 mile loop)",[35,46,56,66,76,85],{"permalink":36,"name":37,"startDate":38,"city":39,"distances":40,"distanceKm":44,"ficheLocales":45},"beast-of-the-blacks-ultra-40-mi-plus-20-10-mile","Beast of the Blacks Ultra 40 mi plus 20 & 10 mile","2027-03-06","Crickhowell",[41,42,43],"17 km","32.5 km","65 km",3,[],{"permalink":47,"name":48,"startDate":49,"city":50,"distances":51,"distanceKm":54,"ficheLocales":55},"beast-of-the-beacons-ultra-40m-plus-20m-10mile","Beast of the Beacons Ultra 40m plus 20m & 10mile","2027-04-17","Llangynidr",[52,53],"16.09 km","32.18 km",6,[],{"permalink":57,"name":58,"startDate":59,"city":60,"distances":61,"distanceKm":64,"ficheLocales":65},"epona-100","Epona 100","2027-05-08","Llanfoist",[62,63],"100 mi","100 km",9,[],{"permalink":67,"name":68,"startDate":69,"city":70,"distances":71,"distanceKm":74,"ficheLocales":75},"beacons-marathon-and-ultra-2026","Beacons Marathon and Ultra","2026-11-09","Talybont-on-Usk",[72,73],"73.7 km","43.3 km",12,[],{"permalink":77,"name":78,"startDate":79,"city":70,"distances":80,"distanceKm":74,"ficheLocales":84},"beacons-ultra-and-trail-marathon","Beacons Ultra and Trail Marathon","2026-11-07",[81,82,83],"21.1 km","41.8 km","75.6 km",[],{"permalink":86,"name":87,"startDate":88,"city":70,"distances":89,"distanceKm":92,"ficheLocales":93},"midnight-mountain-marathon","Midnight Mountain Marathon","2027-06-12",[90,91],"26.2 mi","13.1 mi",14,[]]