Kai-Yau (Angus) (石啟右) Sak
ID 559534
Born : 1980 Cat. M45 Ultrarunner since 2014 HKG
35
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
50
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
9
Countries visited ?HKGHong KongITAItalyJPNJapanKORSouth KoreaMARMoroccoMASMalaysiaSGPSingaporeTPETaiwanUSAUnited States
28,4%
Rank quotient ?This runner's calculation uses 35 eligible race(s): Σ(rank − 1) = 10 948; Σ finishers = 38 557. 10 948 / 38 557 × 100 = 28.39%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed40
Km — ultra races3 197 km
> 100 km5
> 160 km2
> 200 km1
> 24h1
Longest race249,0 km
30. Marathon des Sables — 5/4/2015

Km per year (ultra races)

2022
291
3 races
2023
150
2 races
2024
2025
2026

Race types (share of distance)

Road9,7%
Trail79,5%
Stage7,8%
Elim.2,9%

Records

50 km6h20'05100 km15h57'16100 mi29h48'5912 h82,81 kmBackyard14 loops

HISTORY

35 race(s) · 3 split(s) nested
DateRacePerf.Rk
2024
30.06 50km JPN39. Lake Saroma 50 km Ultramarathon 7:00:19 h218
20.01 100km HKG14th Hong Kong 100 Ultra Trail Race 22:58:04 h527
2023
24.11 97km HKG42th Oxfam Trailwalker Hong Kong 23:15:33 h293
20.05 100km KOR5th Oxfam Trailwalker Korea 18:57:04 h27
06.04 Backyard Ultra HKG4th Big Boar’s Backyard Challenge 93.884 km (14h)20
2019
20.07 100mi USA31th Vermont 100 Mile Endurance Race 29:48:59 h152
19.01 100km HKG9th Hong Kong 100 Ultra Trail Race 22:04:08 h534
2018
16.11 100km HKG37th Oxfam Trailwalker Hong Kong 18:57:13 h306
13.10 76.1km HKG7th Raleigh Challenge Wilson Trail - Whole Course 13:11:17 h14
01.09 50km MAS8th The Most Beautiful Thing (TMBT) 50 km Ultra Trail Marathon 9:56:00 h45
22.06 120km ITA12^ Lavaredo Ultra Trail by UTMB - 120K 27:59:04 h1074
13.05 54km MAS4th Ultimate Trails Of Penang Eco 50 km 13:59:37 h54
28.04 92km JPN5th Shizuoka to Yamanashi 19:15:05 h417
02.03 100km HKG7th TransLantau 100 Ultra Trail 25:57:14 h198
10.02 100km HKG2nd Garmin100 Hong Kong 26:24:19 h149
27.01 100km HKG8th Hong Kong 100 Ultra Trail Race 18:55:31 h535
2017
16.12 100km HKG5th The North Face 100 Hong Kong 24:51:40 h237
17.11 100km HKG36th Oxfam Trailwalker Hong Kong 21:12:34 h405
07.10 57km HKG4th Convoy Totem Run 11:19:04 h89
02.04 64km HKG12th Round the Island Time Trial 8:29:00 h64
14.01 100km HKG7th Hong Kong 100 Ultra Trail Race 15:57:16 h309
2016
04.12 50km HKG5th MSIG Lantau 50 11:35:27 h124
18.11 100km HKG35th Oxfam Trailwalker Hong Kong 20:43:09 h435
26.08 101km ITA11ème Courmayeur-Champex-Chamonix 25:58:56 h1210
16.07 50km SGP2nd MSIG Singapore Action Asia 50 6:20:05 h53
02.04 106km TPE2nd Race Across Taiwan Nonstop 106km 19:35:11 h46
12.03 50km HKG5th TransLantau 50 Ultra Trail 8:54:10 h141
30.01 12h TPE5th Taipei 12hr Ultra Marathon 82.812 km44
23.01 100km HKG6th Hong Kong 100 Ultra Trail Race 16:01:55 h238
2015
17.10 57km HKG2nd Convoy Totem Run 10:03:23 h30
05.04 249km/6stages MAR30. Marathon des Sables 3d 00:50:45 h1230
17.01 100km HKG5th Hong Kong 100 Ultra Trail Race 17:59:01 h306
2014
14.11 100km HKG33th Oxfam Trailwalker Hong Kong 26:59:11 h1373
21.06 12h JPN13. Tokyo Challenge 12 hours 72.270 km19
13.04 64km HKG9th Round the Island Time Trial 8:31:00 h67