Sook-Yin (Magdalene) Siew
ID 372982
Ultrarunner since 2009 SGP
24
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
37
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
6
Countries visited ?AUSAustraliaHKGHong KongSGPSingaporeTHAThailandTPETaiwanUSAUnited States
79,3%
Rank quotient ?This runner's calculation uses 24 eligible race(s): Σ(rank − 1) = 9 218; Σ finishers = 11 630. 9 218 / 11 630 × 100 = 79.26%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed24
Km — ultra races1 821 km
Longest race100,0 km
16th Javelina Jundred 100 km Endurance Run — 27/10/2018

Km per year (ultra races)

2022
2023
2024
2025
2026

Race types (share of distance)

Road22,0%
Trail78,0%

Records

50 km7h25'09100 km17h37'4012 h51,00 km

HISTORY

24 race(s)
DateRacePerf.Rk
2018
27.10 100km USA16th Javelina Jundred 100 km Endurance Run 21:58:26 h177
2017
20.05 100km AUS10th Ultra-Trail Australia 100 km 23:50:00 h983
2015
12.12 50km HKG3rd The North Face 50 Hong Kong 13:08:18 h423
16.05 100km AUS8th The North Face 100 Australia 22:10:26 h770
13.03 100km HKG4th TransLantau 100 Ultra Trail 31:55:37 h338
17.01 100km HKG5th Hong Kong 100 Ultra Trail Race 23:28:59 h971
2014
29.11 84km HKG2nd HK168 half - 84 km ultra-endurance race 20:43:44 h74
27.07 50km AUS13th Glasshouse Flinders Tour 50 km 7:25:09 h75
17.05 100km AUS7th The North Face 100 Australia 19:45:11 h619
15.03 50km HKG3rd TransLantau 50 Ultra Trail 9:46:55 h233
18.01 100km HKG4th Hong Kong 100 Ultra Trail Race 22:45:40 h759
2013
14.12 50km HKG1st The North Face 50 Hong Kong 13:31:43 h368
30.11 84km HKGHK168 half - 84 km ultra-endurance race Hong Kong 21:36:51 h36
03.08 72km TPE1st Shichong Creek Summer Ultramarathon 10:38:05 h396
30.03 16h SGPTwilight Ultra Challenge 60.000 km114
02.02 50km THA2nd The North Face 100 Thailand - 50 km 7:51:39 h120
19.01 100km HKG3rd Hong Kong 100 Ultra Trail Race 29:53:50 h825
2012
30.12 12h SGP4th MR25 Cross Country Ultra Marathon 51.000 km212
24.03 50km HKG1st TransLantau 50 Ultra Trail 13:36:18 h249
2011
18.12 12h SGP3rd MR25 Cross Country Ultra Marathon 51.000 km177
25.06 100km SGP1st Sundown 100 km Ultramarathon 17:37:40 h484
2010
26.12 12h SGP2nd MR25 Cross Country Ultra Marathon 51.000 km186
29.05 84km SGP3rd Sundown Night 84km 13:19:05 h273
2009
30.05 84km SGP2nd Sundown Night 84km 14:43:14 h380