Wei-Siong (Frank) Chong

Born : 1979 Cat. M45 Ultrarunner since 2008

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 ?

United Kingdom

Hong Kong

Malaysia

South Africa

Singapore

Vietnam

59,1%

Rank quotient ?This runner's calculation uses 83 eligible race(s): Σ(rank − 1) = 86 963; Σ finishers = 147 258. 86 963 / 147 258 × 100 = 59.05%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed83

Km — ultra races7 686 km

> 100 km15

> 160 km7

> 200 km2

> 24h2

> 48h1

Longest race346,0 km

Race Across Scotland 215 Mile — 8/8/2026

Km per year (ultra races)

2022

652

2023

356

2024

412

2025

346

2026

Race types (share of distance)

Road55,2%

Trail42,1%

Stage2,1%

Ult.Walk0,6%

Wins & podiums (ultra)

🏆 Win1

🏆 Win M2

🏅 Top 33

🏅 Top 3 M3

Longest winning streak1

Current streak0

Records

50 km5h25'03 100 km13h53'15 100 mi31h34'00 12 h87,40 km 24 h160,00 km 6 d315,25 km

HISTORY

83 race(s) · 2 split(s) nested

Date		Race	Perf.	Rk
2026
08.08	215mi	Race Across Scotland 215 Mile	4d 03:13:22 h	87
2025
14.06	50km	4th Run For It X 50km Challenge	5:25:03 h	1 🏆
26.04	100km	10th TITI 100km Road Ultra Marathon	13:53:15 h	29
28.03	162km	6th Victoria 162	43:00:11 h	67
18.01	100km	15th Hong Kong 100 Ultra Trail Race	25:22:18 h	1178
2024
14.12	12h	2nd KL Sundown 2024	65.000 km	16
09.06	87km	97th Comrades Marathon - Up Run	9:37:39 h	5230
09.03	104km	6th UiTM Ultramarathon 104 km	17:20:11 h	20
20.01	100km	14th Hong Kong 100 Ultra Trail Race	22:48:16 h	510
2023
10.11	139km	10th TransLantau 140 by UTMB	39:15:15 h	234
01.10	72km	2nd Coros Spark 100	17:35:27 h	51
24.06	12h	8th Bedok Reservoir 12 hour Ultramarathon	70.080 km	18
11.06	87km	96th Comrades Marathon - Down Run	10:32:06 h	8302
04.03	168km	8th Route 68 Challenge - 168 km	25:18:14 h	4
18.02	56km	13th Hong Kong 100 Ultra Trail Race - Half	9:23:41 h	129
08.01	12h	5th Bukit Kiara Ultra Challenge	60.000 km	30
2020
15.02	12h	5th Garang Warrior Ultra 12 Hour Run	76.000 km	19
09.02	12h	3rd Bukit Kiara Ultra Challenge	48.500 km	8
18.01	100km	10th Hong Kong 100 Ultra Trail Race	23:13:54 h	836
2019
22.12	12h	1st Bukit Dinding Challenge 3.0 - 12h	70.000 km	13
19.10	24h	7th Back 2 Endurance 12/12 Hour Stage Race	160.000 km	2 🥈
12.10	101km	8th Craze Ultra 101 km	18:52:25 h	50
15.09	52km	3rd Janda Baik Ultra 50 km	7:38:49 h	54
20.07	16h	9th Twilight Ultra Challenge	105.000 km	8
09.06	87km	94th Comrades Marathon - Up Run	10:18:04 h	6535
13.04	12h	7th Bedok Reservoir 12 hour Ultramarathon	77.400 km	10
09.03	100km	3rd Garmin100 Hong Kong	27:28:07 h	153
24.02	12h	2nd Bukit Kiara Ultra Challenge	53.500 km	19
2018
03.11	100mi	7th Craze Ultra 100 Miles	31:34:00 h	21
20.10	100km	2nd Janda Baik Ultra 100 km	23:24:05 h	88
30.09	12h	6th Back 2 Endurance 12 Hour Run	71.300 km	34
21.07	16h	8th Twilight Ultra Challenge	100.000 km	10
30.06	100km	4th St. Cuthbert's Way 100 km Ultra	18:09:59 h	22
23.06	153km	34th West Highland Way Race	26:44:26 h	112
10.06	90km	93rd Comrades Marathon - Down Run	10:53:03 h	9707
28.04	168km	4th Route 68 Challenge - 168km	29:38:29 h	26
27.01	100km	8th Hong Kong 100 Ultra Trail Race	27:43:55 h	1404
06.01	16h	5th Watergate 16hr	50.000 km	174
2017
17.12	53km	1st Janda Baik Ultra 53 km	9:48:52 h	225
23.09	16h	7th Twilight Ultra Challenge	60.000 km	37
10.09	12h	5th Back 2 Endurance 12 Hour Run	59.800 km	70
24.06	153km	33rd West Highland Way Race	30:36:45 h	138
04.06	87km	92nd Comrades Marathon - Up Run	11:54:56 h	13314
26.02	12h	5th Gunung Nuang Endurance 12 hour Run	50.000 km	85
14.01	100km	7th Hong Kong 100 Ultra Trail Race	24:58:15 h	1308
2016
19.11	78km	3rd Putrajaya 100 - 78 km Run	12:58:00 h	8
08.10	100km	1st Cameron 100 km Ultra Trail	26:00:31 h	56
04.09	12h	4th Back 2 Endurance 12 hour Run	87.400 km	8
18.06	153km	32nd West Highland Way Race	28:13:20 h	108
29.05	89km	91st Comrades Marathon - Down Run	10:27:07 h	6530
10.04	70km	2nd Route 68 Challenge - 68 km	8:44:28 h	24
19.03	16h	6th Twilight Ultra Challenge	80.000 km	32
28.02	12h	4th Gunung Nuang Endurance 12 hour Run	60.000 km	20
09.01	16h	3rd Watergate 16hr	60.000 km	72
2015
28.11	100km	2nd Putrajaya 100 - 100 km Run	16:14:31 h	2 🥈
07.11	33mi	Glen Ogle 33	6:23:42 h	244
24.10	38mi	4th Jedburgh Three Peaks ultramarathon	8:56:16 h	156
26.09	70km	3. Vietnam Mountain Marathon	16:27:54 h	90
28.03	16h	5th Twilight Ultra Challenge	75.000 km	61
17.01	100km	5th Hong Kong 100 Ultra Trail Race	23:05:08 h	902
2014
22.11	100km	1st Putrajaya 100 - 100 km Run	18:15:34 h	12
26.10	38mi	3rd Jedburgh Three Peaks ultramarathon	9:33:13 h	114
20.09	100mi	3rd Craze Ultra 100 Miles	31:41:43 h	15
06.09	100km	1. Penang 100 km Challenge	17:32:47 h	68
01.06	89km	89th Comrades Marathon - Down Run	10:57:34 h	7324
29.03	16h	Twilight Ultra Challenge	90.000 km	36
15.02	100km	TITI 100km Road Ultra Marathon	17:55:00 h	84
2013
29.12	12h	5th MR25 Cross Country Ultra Marathon	62.100 km	71
04.10	50km	The North Face 50 Singapore	6:55:31 h	227
02.06	87km road race	88th Comrades Marathon - Up Run	11:30:08 h	7284
30.03	16h	Twilight Ultra Challenge	75.000 km	59
2012
26.12	6d	Festival of running 6 day Circuit Race	315.252 km	18
26.12	24h	Festival of running 6 day Circuit Race - 24h Split	68.554 km	16
26.12	48h	Festival of running 6 day Circuit Race - 48h Split	120.096 km	20
13.10	50km	The North Face 50 Singapore	7:47:54 h	313
03.06	89km road race	87th Comrades Marathon - Down Run	11:53:49 h	11466
11.03	16h	Twilight Ultra Challenge	45.000 km	88
2011
18.12	12h	3rd MR25 Cross Country Ultra Marathon	51.000 km	181
25.06	100km	1st Sundown 100 km Ultramarathon	15:51:56 h	298
26.03	16h	Twilight Ultra Challenge	45.000 km	92
2010
26.12	12h	2nd MR25 Cross Country Ultra Marathon	51.000 km	169
29.05	84km	3rd Sundown Night 84km	10:30:23 h	76
2009
27.12	12h	1st MR25 Cross Country Ultra Marathon	61.200 km	29
30.05	84km	2nd Sundown Night 84km	12:08:01 h	155
2008
13.12	12h	1st Putrajaya International 12 Hour Walk	46.000 km	166

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	8/8/2026	Race Across Scotland 215 Mile	346,01	×4
✓ 2	26/12/2012	Festival of running 6 day Circuit Race	315,25	×4
✓ 3	4/3/2023	8th Route 68 Challenge - 168 km	168,00	×2
✓ 4	28/4/2018	4th Route 68 Challenge - 168km	168,00	×2
✓ 5	28/3/2025	6th Victoria 162	162,00	×2
✓ 6	3/11/2018	7th Craze Ultra 100 Miles	160,93	×2
✓ 7	20/9/2014	3rd Craze Ultra 100 Miles	160,93	×2
✓ 8	19/10/2019	7th Back 2 Endurance 12/12 Hour Stage Race	160,00	×2
✓ 9	23/6/2018	34th West Highland Way Race	153,00	×2
✓ 10	24/6/2017	33rd West Highland Way Race	153,00	×2
✓ 11	18/6/2016	32nd West Highland Way Race	153,00	×2
✓ 12	10/11/2023	10th TransLantau 140 by UTMB	139,00	×1
✓ 13	20/7/2019	9th Twilight Ultra Challenge	105,00	×1
✓ 14	9/3/2024	6th UiTM Ultramarathon 104 km	104,00	×1
✓ 15	12/10/2019	8th Craze Ultra 101 km	101,00	×1
✓ 16	26/4/2025	10th TITI 100km Road Ultra Marathon	100,00	×1
✓ 17	18/1/2025	15th Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 18	20/1/2024	14th Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 19	18/1/2020	10th Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 20	9/3/2019	3rd Garmin100 Hong Kong	100,00	×1
✓ 21	20/10/2018	2nd Janda Baik Ultra 100 km	100,00	×1
✓ 22	21/7/2018	8th Twilight Ultra Challenge	100,00	×1
✓ 23	30/6/2018	4th St. Cuthbert's Way 100 km Ultra	100,00	×1
✓ 24	27/1/2018	8th Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 25	14/1/2017	7th Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 26	8/10/2016	1st Cameron 100 km Ultra Trail	100,00	×1
✓ 27	28/11/2015	2nd Putrajaya 100 - 100 km Run	100,00	×1
✓ 28	17/1/2015	5th Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 29	22/11/2014	1st Putrajaya 100 - 100 km Run	100,00	×1
✓ 30	6/9/2014	1. Penang 100 km Challenge	100,00	×1
✓ 31	15/2/2014	TITI 100km Road Ultra Marathon	100,00	×1
✓ 32	25/6/2011	1st Sundown 100 km Ultramarathon	100,00	×1
✓ 33	10/6/2018	93rd Comrades Marathon - Down Run	90,00	×1
✓ 34	29/3/2014	Twilight Ultra Challenge	90,00	×1
✓ 35	29/5/2016	91st Comrades Marathon - Down Run	89,00	×1
✓ 36	1/6/2014	89th Comrades Marathon - Down Run	89,00	×1
✓ 37	3/6/2012	87th Comrades Marathon - Down Run (RSA)	89,00	×1
✓ 38	4/9/2016	4th Back 2 Endurance 12 hour Run	87,40	×1
✓ 39	9/6/2024	97th Comrades Marathon - Up Run	87,00	×1
✓ 40	11/6/2023	96th Comrades Marathon - Down Run	87,00	×1
✓ 41	9/6/2019	94th Comrades Marathon - Up Run	87,00	×1
✓ 42	4/6/2017	92nd Comrades Marathon - Up Run	87,00	×1
✓ 43	2/6/2013	88th Comrades Marathon - Up Run (RSA)	87,00	×1
✓ 44	29/5/2010	3rd Sundown Night 84km	84,00	×1
✓ 45	30/5/2009	2nd Sundown Night 84km	84,00	×1
✓ 46	19/3/2016	6th Twilight Ultra Challenge	80,00	×1
✓ 47	19/11/2016	3rd Putrajaya 100 - 78 km Run	78,00	×1
✓ 48	13/4/2019	7th Bedok Reservoir 12 hour Ultramarathon	77,40	×1
✓ 49	15/2/2020	5th Garang Warrior Ultra 12 Hour Run	76,00	×1
✓ 50	28/3/2015	5th Twilight Ultra Challenge	75,00	×1
✓ 51	30/3/2013	Twilight Ultra Challenge	75,00	×1
✓ 52	1/10/2023	2nd Coros Spark 100	72,00	×1
✓ 53	30/9/2018	6th Back 2 Endurance 12 Hour Run	71,30	×1
✓ 54	24/6/2023	8th Bedok Reservoir 12 hour Ultramarathon	70,08	×1
✓ 55	22/12/2019	1st Bukit Dinding Challenge 3.0 - 12h	70,00	×1
✓ 56	10/4/2016	2nd Route 68 Challenge - 68 km	70,00	×1
✓ 57	26/9/2015	3. Vietnam Mountain Marathon	70,00	×1
✓ 58	14/12/2024	2nd KL Sundown 2024	65,00	—
✓ 59	29/12/2013	5th MR25 Cross Country Ultra Marathon	62,10	—
✓ 60	27/12/2009	1st MR25 Cross Country Ultra Marathon	61,20	—
✓ 61	24/10/2015	4th Jedburgh Three Peaks ultramarathon	61,16	—
62	26/10/2014	3rd Jedburgh Three Peaks ultramarathon	61,16	—
63	8/1/2023	5th Bukit Kiara Ultra Challenge	60,00	—
64	23/9/2017	7th Twilight Ultra Challenge	60,00	—
65	28/2/2016	4th Gunung Nuang Endurance 12 hour Run	60,00	—
66	9/1/2016	3rd Watergate 16hr	60,00	—
67	10/9/2017	5th Back 2 Endurance 12 Hour Run	59,80	—
68	18/2/2023	13th Hong Kong 100 Ultra Trail Race - Half	56,00	—
69	24/2/2019	2nd Bukit Kiara Ultra Challenge	53,50	—
70	7/11/2015	Glen Ogle 33	53,11	—
71	17/12/2017	1st Janda Baik Ultra 53 km	53,00	—
72	15/9/2019	3rd Janda Baik Ultra 50 km	52,00	—
73	18/12/2011	3rd MR25 Cross Country Ultra Marathon	51,00	—
74	26/12/2010	2nd MR25 Cross Country Ultra Marathon	51,00	—
75	14/6/2025	4th Run For It X 50km Challenge	50,00	—
76	6/1/2018	5th Watergate 16hr	50,00	—
77	26/2/2017	5th Gunung Nuang Endurance 12 hour Run	50,00	—
78	4/10/2013	The North Face 50 Singapore	50,00	—
79	13/10/2012	The North Face 50 Singapore	50,00	—
80	9/2/2020	3rd Bukit Kiara Ultra Challenge	48,50	—
81	13/12/2008	1st Putrajaya International 12 Hour Walk	46,00	—
82	11/3/2012	Twilight Ultra Challenge	45,00	—
83	26/3/2011	Twilight Ultra Challenge	45,00	—