[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"feature-flags":3,"$fbQnyFF5A4FkGC0TprIUBbaDVH8DqmENz5X9C6wu61NA":-1,"$fOet0j_xG1Sv4FhMVo9XzOGtCmBiPHRxgO2-Swg5rO_0":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,"session_reminder_v1":4},true,{"permalink":6,"name":7,"seoTitle":8,"startDate":9,"endDate":8,"country":10,"countryIso":11,"city":12,"location":12,"disciplines":13,"distances":15,"participantsEstimate":8,"bigEventFlag":17,"featured":17,"websiteUrl":18,"socialLinks":19,"registrationUrl":20,"registrationOpenDate":8,"registrationOpenTime":8,"registrationCloseDate":8,"registrationOpenUrl":8,"registrationOpenStatus":8,"entry":8,"description":21,"descriptionLocale":22,"availableLocales":23,"screenshotUrl":8,"department":8,"departmentSlug":8,"distanceHubs":25,"usDistanceHubs":26,"state":8,"regionHub":8,"hasFiche":4,"isRunning":4,"duplicateOfPermalink":8,"isPast":17,"isStale":17,"indexableLocales":27,"nextEditionPermalink":8,"provisional":8,"region":8,"geo":28,"edition":31,"tags":33,"races":34,"nearby":37},"trails-tarmac-back-yard-ultra-winter","Trails & Tarmac Back Yard Ultra - Winter",null,"2027-02-06","United Kingdom","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> takes place on 6 February 2027 in Llangattock, Wales. It follows the backyard ultra format: a loop of 4.167 miles (about 6.7 km), started at the top of every hour until only one runner is left in the race, with no total distance set in advance.\u003C\u002Fp>\u003Cp>This kind of race is less about speed than discipline: finishing each lap in 45 to 50 minutes leaves time to eat, change and catch your breath, and that margin decides how long you stay in the race. Preparation therefore involves practising repeated loops as much as classic long runs. In February darkness falls early, so lighting, spare clothing and a well-organised base are essential.\u003C\u002Fp>","en",[24,22],"fr",[],[],[24,22],{"lat":29,"lng":30},51.856479,-3.13551,{"year":32,"number":8,"firstYear":8},2027,[],[35],{"name":36,"distanceFormatted":8,"distanceMeters":8,"discipline":8,"elevationGain":8,"itraPoints":8,"date":9,"time":8,"lastEditionFinisherCount":8},"Backyard Ultra (4.167 mile loop)",[38,49,59,69,79,89],{"permalink":39,"name":40,"startDate":41,"city":42,"distances":43,"distanceKm":47,"ficheLocales":48},"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",[44,45,46],"17 km","32.5 km","65 km",3,[22],{"permalink":50,"name":51,"startDate":52,"city":53,"distances":54,"distanceKm":57,"ficheLocales":58},"beast-of-the-beacons-ultra-40m-plus-20m-10mile","Beast of the Beacons Ultra 40m plus 20m & 10mile","2027-04-17","Llangynidr",[55,56],"16.09 km","32.18 km",6,[22],{"permalink":60,"name":61,"startDate":62,"city":63,"distances":64,"distanceKm":67,"ficheLocales":68},"epona-100","Epona 100","2027-05-08","Llanfoist",[65,66],"100 mi","100 km",9,[22],{"permalink":70,"name":71,"startDate":72,"city":73,"distances":74,"distanceKm":77,"ficheLocales":78},"beacons-marathon-and-ultra-2026","Beacons Marathon and Ultra","2026-11-09","Talybont-on-Usk",[75,76],"73.7 km","43.3 km",12,[22],{"permalink":80,"name":81,"startDate":82,"city":73,"distances":83,"distanceKm":77,"ficheLocales":88},"brecon-beacons-trail-challenge-2027","Brecon Beacons Trail Challenge","2027-05-03",[84,85,86,87],"52 km","43 km","25 km","11 km",[22],{"permalink":90,"name":91,"startDate":92,"city":73,"distances":93,"distanceKm":77,"ficheLocales":97},"beacons-ultra-and-trail-marathon","Beacons Ultra and Trail Marathon","2026-11-07",[94,95,96],"21.1 km","41.8 km","75.6 km",[22]]