Sai-Kit (Alger) (鄭世傑) Cheng

ID 200440

Born : 1970 Cat. M55 Ultrarunner since 2007

DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.

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

Countries visited ?

Austria

China

France

Greece

Hong Kong

Italy

Japan

South Korea

Malaysia

Singapore

Taiwan

15,2%

Rank quotient ?This runner's calculation uses 85 eligible race(s): Σ(rank − 1) = 6 570; Σ finishers = 43 355. 6 570 / 43 355 × 100 = 15.15%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed85

Km — ultra races8 044 km

> 100 km21

> 160 km10

> 200 km4

> 24h4

> 48h1

Longest race298,0 km

12th Hong Kong Four Trails Ultra Challenge — 21/1/2023

Km per year (ultra races)

207

2022

590

2023

371

2024

170

2025

2026

Race types (share of distance)

Road19,2%

Trail79,2%

Stage1,6%

Wins & podiums (ultra)

🏆 Win0

🏆 Win M2

🏅 Top 34

🏅 Top 3 M5

Longest winning streak0

Current streak0

Records

50 km4h24'51 100 km13h18'55 100 mi34h47'43 24 h203,98 km 48 h188,38 km

HISTORY

85 race(s) · 7 split(s) nested

Date		Race	Perf.	Rk
2025
18.10	50km	11th Raleigh Challenge Wilson Trail - Night Course Duo	8:53:08 h	6
20.04	120km	35th Fuji 5 Lakes Sparta Challenge	14:50:40 h	394
2024
28.11	100km	43th Oxfam Trailwalker Hong Kong	18:49:44 h	83
25.10	121km	8th High Trail Nine Peaks - 9 Peaks	31:28:58 h	26
20.01	100km	14th Hong Kong 100 Ultra Trail Race	23:46:36 h	644
13.01	50km	31th Green Power Hike - Corporation Organisation Cup	5:31:17 h	2 🥈
2023
24.11	97km	42th Oxfam Trailwalker Hong Kong	14:47:52 h	13
01.04	45km	4th Mountain Range 50 - Shatin	6:59:17 h	14
19.03	50km	1st To The Top of Hong Kong Challenge	6:04:21 h	7
24.02	100km	41th Oxfam Trailwalker Hong Kong	18:28:18 h	78
21.01	298km	12th Hong Kong Four Trails Ultra Challenge	2d 18:14:00 h	7
2022
20.11	50km	2nd Kailas Fish N Sheep 50k	8:11:55 h	35
05.11	102km	9th TransLantau 100 by UTMB	19:49:53 h	48
29.05	55km	3rd MSIG HK50 West	7:34:48 h	10
2020
15.03	45km	4th WAA Hong Kong NE50	6:38:11 h	16
18.01	100km	10th Hong Kong 100 Ultra Trail Race	15:34:51 h	120
2019
14.12	100km	7th The North Face 100 Hong Kong	17:25:59 h	19
03.11	50km	2nd MSIG Summits - Mui Wo	8:10:03 h	19
02.08	106km	Pitz Alpine Glacier Trail 106 km	25:50:23 h	25
22.06	100mi	5th Ultimate Trails Of Penang Eco 100 miles	34:47:43 h	13
20.04	110km	5th Ultimate Tsaigu Trail Kuocang - 110 km	28:38:14 h	123
02.03	50km	8th TransLantau 50 Ultra Trail	6:35:21 h	7
2018
16.11	100km	37th Oxfam Trailwalker Hong Kong	15:19:10 h	80
01.10	45km	2nd Ferei Maclehose Trail Dark 45 - MT2	4:57:59 h	9
26.05	103km	3rd Ultra-Trail of Mt. Guguan 103 km Run	39:00:29 h	10
30.03	176.8km	1st Victoria 162	34:45:03 h	4
24.03	100km	1st Rebel Walker 100	16:17:22 h	35
02.03	100km	7th TransLantau 100 Ultra Trail	20:09:11 h	47
25.02	54km	2nd The 9 Dragons - 50 km	9:53:50 h	23
10.02	100km	2nd Garmin100 Hong Kong	22:25:13 h	49
27.01	100km	8th Hong Kong 100 Ultra Trail Race	13:51:46 h	101
2017
16.12	100km	5th The North Face 100 Hong Kong	17:18:00 h	26
03.12	50km	6th MSIG Lantau 50	9:34:25 h	66
17.11	100km	36th Oxfam Trailwalker Hong Kong	26:24:53 h	1131
08.10	45km	1st Ferei Dark 45	7:06:54 h	16
01.10	45km	1st Ferei Maclehose Trail Dark 45	6:41:55 h	8
31.03	246km	3rd Race Across Taiwan Nonstop 246km	42:37:09 h	24
18.02	100km	1st Garmin100 Hong Kong	22:11:26 h	26
04.02	130km/2stages	1st The 9 Dragons - 50/50	22:29:14 h	11
14.01	100km	7th Hong Kong 100 Ultra Trail Race	14:58:36 h	165
2016
10.12	100km	4th The North Face 100 Hong Kong	18:31:42 h	32
04.12	50km	5th MSIG Lantau 50	8:42:42 h	32
18.11	100km	35th Oxfam Trailwalker Hong Kong	17:14:32 h	149
29.10	70km	4th Lantau Trail race 70k	12:24:18 h	40
30.09	246km	34. Spartathlon	34:45:32 h	147
25.06	100km	2nd The Beast Trail 100km	26:14:00 h	2 🥈
29.01	48h	5th Taipei 48hr Ultra Marathon	188.376 km	27
29.01	50km	5th Taipei 48hr Ultra Marathon - 50km Split	5:58:16 h	24
29.01	6h	5th Taipei 48hr Ultra Marathon - 6h Split	50.100 km	25
29.01	50mi	5th Taipei 48hr Ultra Marathon - 50mi Split	10:56:12 h	24
29.01	12h	5th Taipei 48hr Ultra Marathon - 12h Split	87.508 km	22
29.01	100km	5th Taipei 48hr Ultra Marathon - 100km Split	14:04:40 h	21
29.01	24h	5th Taipei 48hr Ultra Marathon - 24h Split	155.644 km	19
29.01	100mi	5th Taipei 48hr Ultra Marathon - 100mi Split	24:54:14 h	18
2015
19.12	24h	10th Jingu Gaien 24 Hour Challenge	105.980 km	109
06.12	50km	4th MSIG Lantau 50	9:18:47 h	45
08.11	50km	5th MSIG HK50	6:48:02 h	20
31.10	70km	3rd Lantau Trail race 70k	11:02:21 h	20
11.10	50km	1st The Beast Trail 50km	12:50:00 h	15
11.10	50km	1st The Beast Trail 50km	12:50:00 h	16
25.07	50km	1st MSIG Singapore Action Asia 50	5:45:57 h	39
09.05	100km	7th The North Face 100 China	15:52:58 h	27
11.04	24h	IAU 24h WC (7^ 24 ore di Torino)	166.344 km	197
13.03	100km	4th TransLantau 100 Ultra Trail	18:18:01 h	24
30.01	24h	1st Hong Kong Ultra Marathon 24hr	203.977 km	9
17.01	100km	5th Hong Kong 100 Ultra Trail Race	13:18:55 h	41
2014
13.12	50km	2nd The North Face 50 Hong Kong	7:54:15 h	36
07.12	50km	3rd MSIG Lantau 50	8:16:43 h	27
01.11	70km	2nd Lantau Trail race 70k	11:51:21 h	24
26.10	50km	4th MSIG HK50	6:21:36 h	28
10.10	156km	3rd Raleigh Challenge Wilson Trail - Round Trip	33:09:43 h	3 🥉
27.06	119km	8^ Lavaredo Ultra Trail by UTMB - 120K	22:11:14 h	255
05.04	200km	13th Jeju-do around 200 km	29:14:04 h	10
14.03	100km	3rd TransLantau 100 Ultra Trail	16:53:41 h	14
01.03	50km	2nd MSIG Sai Kung 50	6:42:53 h	26
2013
14.12	100km	1st The North Face 100 Hong Kong	19:42:36 h	72
15.11	100km	32th Oxfam Trailwalker Hong Kong	15:40:57 h	69
30.08	168km	11ème Ultra Trail Tour du Mont Blanc	43:04:06 h	1135
16.03	100km	2nd Translantau 100 Ultra Trail	16:50:00 h	12
19.01	100km	3rd Hong Kong 100 Ultra Trail Race	13:38:07 h	45
2012
08.12	50km	1st MSIG Lantau 50	7:19:58 h	29
27.10	50km	2nd MSIG HK50	5:30:24 h	45
18.05	156km	1st Ultra-Trail Mount Fuji	34:01:25 h	119
01.04	64km	7th Round the Island Time Trial	6:06:00 h	7
24.03	50km	1st TransLantau 50 Ultra Trail	7:23:07 h	23
18.02	100km	2nd Hong Kong 100 Ultra Trail Race	14:10:05 h	56
2011
29.10	50km	1st MSIG HK50	4:24:51 h	7
03.04	64km	6th Round the Island Time Trial	6:13:00 h	3 🥉
15.01	100km	1st Hong Kong 100 Ultra Trail Race	15:05:00 h	21
2009
05.04	64km	5th Round the Island Time Trial	6:39:00 h	7
2008
06.04	64km	4th Round the Island Time Trial	7:15:00 h	23
2007
15.04	64km	3rd Round the Island Time Trial	7:37:00 h	28

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	21/1/2023	12th Hong Kong Four Trails Ultra Challenge	298,00	×4
✓ 2	31/3/2017	3rd Race Across Taiwan Nonstop 246km	246,00	×3
✓ 3	30/9/2016	34. Spartathlon	246,00	×3
✓ 4	30/1/2015	1st Hong Kong Ultra Marathon 24hr	203,98	×2
✓ 5	5/4/2014	13th Jeju-do around 200 km	200,00	×2
✓ 6	29/1/2016	5th Taipei 48hr Ultra Marathon	188,38	×2
✓ 7	30/3/2018	1st Victoria 162	176,80	×2
✓ 8	30/8/2013	11ème Ultra Trail Tour du Mont Blanc (UTMB)	168,00	×2
✓ 9	11/4/2015	IAU 24h WC (7^ 24 ore di Torino)	166,34	×2
✓ 10	22/6/2019	5th Ultimate Trails Of Penang Eco 100 miles	160,93	×2
✓ 11	10/10/2014	3rd Raleigh Challenge Wilson Trail - Round Trip	156,00	×2
✓ 12	18/5/2012	1st Ultra-Trail Mount Fuji (UTMF)	156,00	×2
✓ 13	4/2/2017	1st The 9 Dragons - 50/50	130,00	×1
✓ 14	25/10/2024	8th High Trail Nine Peaks - 9 Peaks	121,00	×1
✓ 15	20/4/2025	35th Fuji 5 Lakes Sparta Challenge	120,00	×1
✓ 16	27/6/2014	8^ Lavaredo Ultra Trail by UTMB - 120K	119,00	×1
✓ 17	20/4/2019	5th Ultimate Tsaigu Trail Kuocang - 110 km	110,00	×1
✓ 18	2/8/2019	Pitz Alpine Glacier Trail 106 km	106,00	×1
✓ 19	19/12/2015	10th Jingu Gaien 24 Hour Challenge	105,98	×1
✓ 20	26/5/2018	3rd Ultra-Trail of Mt. Guguan 103 km Run	103,00	×1
✓ 21	5/11/2022	9th TransLantau 100 by UTMB	102,00	×1
✓ 22	28/11/2024	43th Oxfam Trailwalker Hong Kong	100,00	×1
✓ 23	20/1/2024	14th Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 24	24/2/2023	41th Oxfam Trailwalker Hong Kong	100,00	×1
✓ 25	18/1/2020	10th Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 26	14/12/2019	7th The North Face 100 Hong Kong	100,00	×1
✓ 27	16/11/2018	37th Oxfam Trailwalker Hong Kong	100,00	×1
✓ 28	24/3/2018	1st Rebel Walker 100	100,00	×1
✓ 29	2/3/2018	7th TransLantau 100 Ultra Trail	100,00	×1
✓ 30	10/2/2018	2nd Garmin100 Hong Kong	100,00	×1
✓ 31	27/1/2018	8th Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 32	16/12/2017	5th The North Face 100 Hong Kong	100,00	×1
✓ 33	17/11/2017	36th Oxfam Trailwalker Hong Kong	100,00	×1
✓ 34	18/2/2017	1st Garmin100 Hong Kong	100,00	×1
✓ 35	14/1/2017	7th Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 36	10/12/2016	4th The North Face 100 Hong Kong	100,00	×1
✓ 37	18/11/2016	35th Oxfam Trailwalker Hong Kong	100,00	×1
✓ 38	25/6/2016	2nd The Beast Trail 100km	100,00	×1
✓ 39	9/5/2015	7th The North Face 100 China	100,00	×1
✓ 40	13/3/2015	4th TransLantau 100 Ultra Trail	100,00	×1
✓ 41	17/1/2015	5th Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 42	14/3/2014	3rd TransLantau 100 Ultra Trail	100,00	×1
✓ 43	14/12/2013	1st The North Face 100 Hong Kong	100,00	×1
✓ 44	15/11/2013	32th Oxfam Trailwalker Hong Kong	100,00	×1
✓ 45	16/3/2013	2nd Translantau 100 Ultra Trail	100,00	×1
✓ 46	19/1/2013	3rd Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 47	18/2/2012	2nd Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 48	15/1/2011	1st Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 49	24/11/2023	42th Oxfam Trailwalker Hong Kong	97,00	×1
✓ 50	29/10/2016	4th Lantau Trail race 70k	70,00	×1
✓ 51	31/10/2015	3rd Lantau Trail race 70k	70,00	×1
✓ 52	1/11/2014	2nd Lantau Trail race 70k	70,00	×1
✓ 53	1/4/2012	7th Round the Island Time Trial	64,00	—
✓ 54	3/4/2011	6th Round the Island Time Trial	64,00	—
✓ 55	5/4/2009	5th Round the Island Time Trial	64,00	—
✓ 56	6/4/2008	4th Round the Island Time Trial	64,00	—
✓ 57	15/4/2007	3rd Round the Island Time Trial	64,00	—
58	29/5/2022	3rd MSIG HK50 West	55,00	—
59	25/2/2018	2nd The 9 Dragons - 50 km	54,00	—
60	18/10/2025	11th Raleigh Challenge Wilson Trail - Night Course Duo	50,00	—
61	13/1/2024	31th Green Power Hike - Corporation Organisation Cup	50,00	—
62	19/3/2023	1st To The Top of Hong Kong Challenge	50,00	—
63	20/11/2022	2nd Kailas Fish N Sheep 50k	50,00	—
64	3/11/2019	2nd MSIG Summits - Mui Wo	50,00	—
65	2/3/2019	8th TransLantau 50 Ultra Trail	50,00	—
66	3/12/2017	6th MSIG Lantau 50	50,00	—
67	4/12/2016	5th MSIG Lantau 50	50,00	—
68	6/12/2015	4th MSIG Lantau 50	50,00	—
69	8/11/2015	5th MSIG HK50	50,00	—
70	11/10/2015	1st The Beast Trail 50km	50,00	—
71	25/7/2015	1st MSIG Singapore Action Asia 50	50,00	—
72	13/12/2014	2nd The North Face 50 Hong Kong	50,00	—
73	7/12/2014	3rd MSIG Lantau 50	50,00	—
74	26/10/2014	4th MSIG HK50	50,00	—
75	1/3/2014	2nd MSIG Sai Kung 50	50,00	—
76	8/12/2012	1st MSIG Lantau 50	50,00	—
77	27/10/2012	2nd MSIG HK50	50,00	—
78	24/3/2012	1st TransLantau 50 Ultra Trail	50,00	—
79	29/10/2011	1st MSIG HK50	50,00	—
80	1/4/2023	4th Mountain Range 50 - Shatin	45,00	—
81	15/3/2020	4th WAA Hong Kong NE50	45,00	—
82	1/10/2018	2nd Ferei Maclehose Trail Dark 45 - MT2	45,00	—
83	8/10/2017	1st Ferei Dark 45	45,00	—
84	1/10/2017	1st Ferei Maclehose Trail Dark 45	45,00	—