Joanna (Joasia) Zakrzewski
ID 119717
Born : 1976 Cat. W50 Ultrarunner since 2010 GBR
50
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
70
DUV-index+ ?Largest integer N such that the race distances provide at least N complete segments of N km in total. A single long race may therefore contribute several segments. See the DUV-Index tab for the detailed calculation. calculation details
21
Countries visited ?AUSAustraliaCHIChileCHNChinaESPSpainFRAFranceGBRUnited KingdomHKGHong KongINDIndiaITAItalyJORJordanNAMNamibiaNEDNetherlandsNORNorwayNZLNew ZealandOMAOmanPORPortugalQATQatarRSASouth AfricaSUISwitzerlandSWESwedenTPETaiwan
5,0%
Rank quotient ?This runner's calculation uses 71 eligible race(s): Σ(rank − 1) = 2 530; Σ finishers = 50 711. 2 530 / 50 711 × 100 = 4.99%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed88
Km — ultra races8 233 km
> 100 km20
> 160 km16
> 200 km13
> 24h9
> 48h1
Longest race411,5 km
12th Taipei 48hr Ultra Marathon — 10/2/2023

Km per year (ultra races)

447
2 races
2022
778
5 races
2023
441
2 races
2024
854
6 races
2025
312
2 races
2026

Race types (share of distance)

Road54,0%
Trail34,3%
Stage11,7%

Wins & podiums (ultra)

🏆 Win6
🏆 Win F26
🏅 Top 316
🏅 Top 3 F46
Longest winning streak2
Current streak0

Records

50 km3h26'37100 km7h31'3350 mi7h21'30100 mi24h57'086 h52,26 km12 h129,22 km24 h247,98 km48 h411,46 km

HISTORY

76 race(s) · 17 split(s) nested
DateRacePerf.Rk
2026
04.07 24h AUSSouthern Sydney Track Ultra - 24h 209.400 km3 🥉
14.02 103km NZL17th Tarawera 100 km Ultramarathon 12:38:05 h91
2025
18.10 24h FRA12ème 24 heures d'Albi, IAU 24h WC 222.529 km97
18.10 24h FRA12ème 24 heures d'Albi, WMA 24h WC 222.529 km41
20.09 50km AUSPilliga Ultra 6:25:33 h14
19.09 80km/3stages AUSPilliga Ultra - Grand Slam 9:48:42 h5
28.06 106km AUSUltra Trail Jervis Bay - 106km 10:59:45 h5
18.04 173km GBRBelfast 2 Dublin Ultra 17:15:21 h2 🥈
2024
09.11 24h AUSSA Track Ultra 24h 233.242 km1 🏆
31.08 24h AUSSouthern Sydney 24 Hour Ultra - 24h 207.699 km3 🥉
2023
08.12 161km AUS2nd Ultra-Trail Kosciuszko by UTMB - Kosci Miler 24:57:08 h24
18.11 50km AUS10th Stromlo Lightning Strike 50km 4:16:40 h6
17.09 100km AUSSurf Coast Century 100 km 10:07:25 h10
10.02 48h TPE12th Taipei 48hr Ultra Marathon 411.458 km1 🏆
15.01 56km AUS19th Two Bays 56 km Trail Run 5:20:08 h31
2022
17.09 24h ITA28^ Lupatotissima - 24 ore, 23rd IAU 24H EC 247.984 km32
02.07 24h INDIAU 24h Asia and Oceania Championships - Open 198.800 km3 🥉
23.04 6h GBR3rd Centurion Track 100 - 6h Split 71.148 km11
23.04 50km GBR3rd Centurion Track 100 - 50km Split 4:04:16 h10
23.04 50mi GBR3rd Centurion Track 100 - 50mi Split 6:55:31 h10
2021
14.08 215mi GBRUltra Great Britain 215 Miles 2d 14:20:00 h2 🥈
15.05 50km AUS8th Ultra-Trail Australia 50 km 5:42:58 h47
13.03 45km AUS37th Six Foot Track 4:20:58 h47
21.02 50km AUSSnowies Trail Run Festival 4:35:13 h8
06.02 82km AUS40th Cradle Mountain Run 11:43:00 h25
2020
04.12 240km AUSCoast to Kosci Ultramarathon 28:18:53 h3 🥉
25.07 24h AUSAustralian 24 Hour Track Invitational 236.561 km2 🥈
16.02 7h GBRRun to Infinity & Beyond 68.558 km1 🏆
02.02 8h GBRFalkirk 8 Hour Ultra Trail Race 92.332 km2 🥈
04.01 12h AUSNarrabeen Allnighter 12 hours Trail 129.222 km2 🥈
2019
23.11 100km JORIAU 100km Asia and Oceania Championships Open 8:25:47 h1 🏆
09.11 52km HKG3rd TransNT 57 km Run 7:13:50 h9
27.07 84.9km SUI7. Swissalpine Irontrail T88 11:28:03 h29
28.04 250km/6stages NAMSahara Race Namibia 28:10:44 h5
13.04 92km/2stages GBRUltra Tour of Arran 11:51:00 h6
2018
29.11 137km OMA1st Oman by UTMB 33:56:57 h33
2017
30.09 100km CHNFuxian Lake Highland Ultramarathon 100K 8:50:25 h14
19.08 45km SWE4th Ultravasan45 3:06:12 h10
10.06 50km ITATrail Sacred Forests 50km - IAU Trail World Championship 6:31:07 h190
07.05 6h 4th Wings for Life World Run 52.260 km155
2016
27.11 100km ESP100km Los Alcazares, combined IAU & WMA & open race 7:41:38 h63
27.11 100km ESP100km Los Alcazares, WMA 100 km WC 7:41:48 h25
27.11 100km ESP100km Los Alcazares, IAU 100 km WC 7:41:38 h60
29.10 85km POR6th IAU Trail WC Trans Peneda-Geres, Braga 11:46:51 h118
25.06 53.5mi GBRRace to the King Ultra Marathon 7:57:22 h1 🏆
04.06 50mi NORLofoten Ultra Trail 50 Mile 10:38:27 h1 🏆
21.05 37mi GBROld County Tops Fell Race 8:10:04 h19
08.05 6h 3rd Wings for Life World Run 50.710 km154
01.01 30mi GBR6th Hardmoors 30 4:02:37 h5
2015
12.09 50km NED40. RUN Winschoten 100 km - 50km Split 3:38:40 h70
12.09 100km NEDIAU 100km EC (RUN Winschoten 100 km) 7:31:33 h43
12.09 100km NEDIAU 100km WC (RUN Winschoten 100 km) 7:31:33 h57
12.09 100km NED40. RUN Winschoten 100 km - open race 7:31:33 h60
22.06 292km/5stages GBR3rd Dragon's Back Race 2d 04:35:56 h12
31.05 87km RSA90th Comrades Marathon - Up Run 7:00:45 h144
03.05 6h 2nd Wings for Life World Run 51.110 km158
2014
21.11 100km QATIAU 100km World Championship - open race 7:42:02 h41
21.11 100km QATWMA 100km Championship 7:42:02 h9
21.11 100km QAT27th IAU 100km World Championship 7:42:02 h41
31.10 50km QATIAU 50k Trophy Final 3:33:23 h13
04.05 6h 1st Wings for Life World Run 45.390 km145
26.04 53mi GBR9th Highland Fling Race 53 Mile 8:30:29 h12
01.01 30mi GBR4th Hardmoors 30 4:07:00 h2 🥈
2013
06.07 75km GBR4th IAU Trail WC Llanrwst/Conwy 7:01:01 h37
02.06 87km road race RSA88th Comrades Marathon - Up Run 6:53:29 h98
2012
20.10 50km ITA50 km Lungo Il Mare 3:47:51 h20
28.07 79.4km SUI27. Swiss Alpine Marathon 7:21:30 h26
03.06 89km road race RSA87th Comrades Marathon - Down Run 6:33:41 h104
2011
10.09 100km NEDIAU 100km EC (RUN Winschoten 100 km) 7:41:06 h29
10.09 100km NEDIAU 100km WC (RUN Winschoten 100 km) 7:41:06 h39
10.09 50km NED36. RUN Winschoten 100 km - 50km Split 3:42:39 h40
10.09 100km NED36. RUN Winschoten 100 km 7:41:06 h40
20.08 50km NED4. Internationale Ultraloop 50 van Assen (IAU Trophy Final) 3:26:37 h22
30.07 79.1km SUI26. Swiss Alpine Marathon 7:36:50 h27
2010
07.08 43mi GBRDevil o' the Highlands 43 Mile Footrace 6:51:30 h9
07.03 250km/6stages CHI6th Atacama Crossing 33:37:30 h7