Jae-Duk (심재덕) Sim

Born : 1969 Cat. M55 Ultrarunner since 2002

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 ?

China

France

Greece

Hong Kong

Japan

South Korea

Malaysia

Netherlands

Portugal

Qatar

Singapore

Sweden

Thailand

United States

3,0%

Rank quotient ?This runner's calculation uses 85 eligible race(s): Σ(rank − 1) = 1 150; Σ finishers = 38 142. 1 150 / 38 142 × 100 = 3.02%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed85

Km — ultra races8 112 km

> 100 km17

> 160 km9

> 200 km3

> 24h1

Longest race245,3 km

26. Spartathlon — 26/9/2008

Km per year (ultra races)

427

2022

389

2023

529

2024

332

2025

148

2026

Race types (share of distance)

Road29,3%

Trail69,4%

Stage1,2%

Wins & podiums (ultra)

🏆 Win22

🏆 Win M23

🏅 Top 351

🏅 Top 3 M51

Longest winning streak3

Current streak0

Records

50 km4h50'11 100 km7h10'31 50 mi11h06'38 100 mi16h48'22 12 h142,50 km 24 h211,65 km

HISTORY

86 race(s) · 1 split(s) nested

Date		Race	Perf.	Rk
2026
07.06	48km	2nd korea 50k Chuncheon	6:05:08 h	3 🥉
16.05	100km	8th TNF 100 Korea	12:30:47 h	2 🥈
2025
12.10	71.5km	33th Hasetsune Cup - Japan Mountain Endurance Race	9:57:07 h	21
20.09	110km	7th Seoul Ultra Trail 100K	14:03:01 h	3 🥉
06.09	50km	2nd Dynafit Taebaek Trail	5:35:16 h	1 🏆
17.05	100km	7th TNF 100 Korea	12:39:45 h	3 🥉
2024
16.11	99km	1st Malaysia Ultra-Trail by UTMB - MY100	13:37:58 h	7
19.10	110km	6th Seoul Ultra Trail 100K	13:23:56 h	1 🏆
28.09	70km	4th Jangsu Trail - September	9:19:58 h	1 🏆
07.09	50km	1st Dynafit Taebaek Trail	5:39:05 h	2 🥈
08.06	50km	11th Geoje Jimaek Trail Run - 50 km	8:51:31 h	2 🥈
18.05	100km	6th TNF 100 Korea	11:53:13 h	3 🥉
27.04	50km	9th Korea 50K	5:48:12 h	4
2023
08.10	71.5km	31th Hasetsune Cup - Japan Mountain Endurance Race	10:01:21 h	69
03.06	50km	10th Geoje Jimaek Trail Run - 50 km	5:55:05 h	2 🥈
20.05	100km	5th TNF 100 Korea	12:40:58 h	4
21.04	167km	8th Ultra-Trail Mt. Fuji	28:13:58 h	112
2022
09.12	171km	3rd Thailand by UTMB - 100mi	30:29:20 h	34
27.10	45km	6th High Trail Nine Peaks - 5 Peaks	6:08:26 h	4
15.10	100km	4th Seoul Ultra Trail 100K	14:04:06 h	3 🥉
25.06	111km	9th Geoje Jimaek Trail Run - 111 km	14:21:15 h	2 🥈
2021
17.10	50km	1st Seoul 100 Korea - SKY B	4:50:11 h	3 🥉
16.10	54km	1st Seoul 100 Korea - SKY A1	7:12:46 h	2 🥈
10.07	55km	1st Jirisan Ultra Trail Run	9:37:01 h	2 🥈
26.06	100mi	1st Seoul 100 Mile Endurance Run	21:25:19 h	2 🥈
23.05	48km	27th Jirisan Flower Stalk	7:42:00 h	2 🥈
2020
30.10	105km	4th High Trail Nine Peaks - 8 Peaks	19:39:38 h	2 🥈
2019
19.10	100km	1st Seoul Ultra Trail 100K	12:40:49 h	2 🥈
13.07	65km	10th Nozawa Onsen 4100D Mountain Trail	7:49:20 h	4
18.05	100km	4th TNF 100 Korea	12:21:48 h	1 🏆
21.04	80km	5th Korea 80K	11:06:38 h	2 🥈
31.03	64km	1st Gurye Mt. Jiri Skyrace	8:52:33 h	4
2018
17.11	106km	4th FunTrails100K Round	17:00:00 h	11
07.10	71.5km	26th Hasetsune Cup - Japan Mountain Endurance Race	10:30:28 h	37
11.08	102km	3rd Yang Yang Int. Trailrun 100km	10:48:00 h	1 🏆
19.05	100km	3rd TNF 100 Korea	12:03:17 h	3 🥉
02.03	100km	7th TransLantau 100 Ultra Trail	16:49:32 h	10
2017
16.12	50km	5th The North Face 50 Hong Kong	7:45:35 h	26
08.10	71.5km	25th Hasetsune Cup - Japan Mountain Endurance Race	8:46:32 h	8
16.09	102km	9th Shinetsu Five Mountains Trail 100 mile	12:07:35 h	7
03.06	70km	5th Geoje Jimaek Trail Run - 70 km	9:07:45 h	1 🏆
20.05	100km	2nd TNF 100 Korea	12:30:50 h	1 🏆
21.04	58km	3rd Korea 50K	7:11:39 h	4
2016
29.10	85km	6th IAU Trail WC Trans Peneda-Geres, Braga	11:32:56 h	112
09.10	71.5km	24th Hasetsune Cup - Japan Mountain Endurance Race	9:07:54 h	17
26.08	170km	14ème Ultra Trail Tour du Mont Blanc	32:19:06 h	123
14.08	47km	17th Jirisan Ultra Marathon	8:07:00 h	5
18.06	24h	1st Mount Xiqiao Int. 24 Hour Ultra Marathon	211.650 km	3 🥉
11.06	100km	1st TNF 100 Korea	13:08:32 h	1 🏆
28.05	100km	9th Bukhangang 100 km Ultra Marathon Race	8:53:00 h	1 🏆
24.04	59.5km	2nd Korea 50K	7:19:20 h	2 🥈
2015
21.11	100km	KUMF 100km Cup	7:27:58 h	1 🏆
31.10	71.5km	23rd Hasetsune Cup - Japan Mountain Endurance Race	8:16:45 h	9
22.08	90km	2nd Ultravasan90	7:23:50 h	24
30.05	84km	5th IAU Trail WC Annecy (4ème La Maxi Race du Lac d'Annecy)	11:06:43 h	105
02.05	100km	14th Jeju City 100 km	7:38:10 h	1 🏆
2014
21.11	100km	IAU 100km World Championship - open race	8:01:55 h	64
21.11	100km	27th IAU 100km World Championship	8:01:55 h	64
12.10	71.5km	22nd Hasetsune Cup - Japan Mountain Endurance Race	9:38:54 h	75
26.04	88km	3rd Shizuoka to Yamanashi	10:56:09 h	2 🥈
18.01	100km	4th Hong Kong 100 Ultra Trail Race	11:52:09 h	17
2013
06.07	100km	1st Yeongsangang Ultra Marathon	8:18:54 h	1 🏆
01.06	100km	1st Tokyo Shibamata 100 km	7:45:51 h	2 🥈
2011
09.10	71.5km	19th Hasetsune Cup - Japan Mountain Endurance Race	7:56:25 h	3 🥉
25.06	100mi	38th Western States 100 Mile Endurance Run	16:48:22 h	12
26.03	100km	10th Jeju City 100 km	7:16:13 h	2 🥈
2010
27.06	100km	10th Nichinan Orochi 100 km Marathon	7:14:26 h	1 🏆
29.05	84km	3rd Sundown Night 84km	6:18:39 h	1 🏆
2009
11.10	71.5km	17th Hasetsune Cup - Japan Mountain Endurance Race	7:42:21 h	3 🥉
27.06	12h	5th Dongbaek Park Ultra Marathon	142.500 km	1 🏆
2008
26.09	245.3km	26. Spartathlon	26:27:48 h	7
16.08	100km	4th Busan Summer Beach 100 km Ultra Marathon	8:11:40 h	1 🏆
02.08	100km	3rd Gangjin Ultra Marathon	9:01:32 h	1 🏆
26.07	100km	1st Daegu Kumho River Ultra Marathon - 100km	7:18:26 h	1 🏆
2007
18.11	100km	8th Seoul Ultra Marathon 100 km	7:30:20 h	2 🥈
23.06	100mi	34th Western States 100 Mile Endurance Run	18:44:54 h	11
13.01	100km	3rd Busan Beach Ultramarathon 100km	8:30:54 h	1 🏆
2006
19.11	100km	7th Seoul Ultra Marathon 100 km	7:29:46 h	3 🥉
08.10	71.5km	14th Hasetsune Cup - Japan Mountain Endurance Race	7:52:24 h	1 🏆
11.02	100km	2nd Gyeongnam Goseong Ultra Marathon	7:59:00 h	1 🏆
2005
30.09	245.3km	23. Spartathlon	35:56:52 h	97
26.06	100km	IAU 100km WC Yubetsu (20. Lake Saroma 100 km Ultramarathon)	7:11:49 h	15
26.06	50km	IAU 100km WC Yubetsu (20. Lake Saroma 100 km Ultramarathon) - 50 km Split	3:26:01 h	19
2004
11.09	100km	29. IAU 100km WC Winschoten	7:13:35 h	21
11.09	50mi	29. IAU 100km WC Winschoten - 50mi split	6:24:18 h	20
02.05	100km	100 km Ultra-Marathon Seoul	7:10:31 h	1 🏆
2002
12.10	71.5km	10th Hasetsune Cup - Japan Mountain Endurance Race	8:49:55 h	2 🥈

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	26/9/2008	26. Spartathlon	245,30	×3
✓ 2	30/9/2005	23. Spartathlon	245,30	×3
✓ 3	18/6/2016	1st Mount Xiqiao Int. 24 Hour Ultra Marathon	211,65	×2
✓ 4	9/12/2022	3rd Thailand by UTMB - 100mi	171,00	×2
✓ 5	26/8/2016	14ème Ultra Trail Tour du Mont Blanc (UTMB)	170,00	×2
✓ 6	21/4/2023	8th Ultra-Trail Mt. Fuji (UTMF)	167,00	×2
✓ 7	26/6/2021	1st Seoul 100 Mile Endurance Run	160,93	×2
✓ 8	25/6/2011	38th Western States 100 Mile Endurance Run	160,93	×2
✓ 9	23/6/2007	34th Western States 100 Mile Endurance Run	160,93	×2
✓ 10	27/6/2009	5th Dongbaek Park Ultra Marathon	142,50	×2
✓ 11	25/6/2022	9th Geoje Jimaek Trail Run - 111 km	111,00	×1
✓ 12	20/9/2025	7th Seoul Ultra Trail 100K	110,00	×1
✓ 13	19/10/2024	6th Seoul Ultra Trail 100K	110,00	×1
✓ 14	17/11/2018	4th FunTrails100K Round	106,00	×1
✓ 15	30/10/2020	4th High Trail Nine Peaks - 8 Peaks	105,00	×1
✓ 16	11/8/2018	3rd Yang Yang Int. Trailrun 100km	102,00	×1
✓ 17	16/9/2017	9th Shinetsu Five Mountains Trail 100 mile	102,00	×1
✓ 18	16/5/2026	8th TNF 100 Korea	100,00	×1
✓ 19	17/5/2025	7th TNF 100 Korea	100,00	×1
✓ 20	18/5/2024	6th TNF 100 Korea	100,00	×1
✓ 21	20/5/2023	5th TNF 100 Korea	100,00	×1
✓ 22	15/10/2022	4th Seoul Ultra Trail 100K	100,00	×1
✓ 23	19/10/2019	1st Seoul Ultra Trail 100K	100,00	×1
✓ 24	18/5/2019	4th TNF 100 Korea	100,00	×1
✓ 25	19/5/2018	3rd TNF 100 Korea	100,00	×1
✓ 26	2/3/2018	7th TransLantau 100 Ultra Trail	100,00	×1
✓ 27	20/5/2017	2nd TNF 100 Korea	100,00	×1
✓ 28	11/6/2016	1st TNF 100 Korea	100,00	×1
✓ 29	28/5/2016	9th Bukhangang 100 km Ultra Marathon Race	100,00	×1
✓ 30	21/11/2015	KUMF 100km Cup	100,00	×1
✓ 31	2/5/2015	14th Jeju City 100 km	100,00	×1
✓ 32	21/11/2014	IAU 100km World Championship - open race	100,00	×1
✓ 33	18/1/2014	4th Hong Kong 100 Ultra Trail Race	100,00	×1
✓ 34	6/7/2013	1st Yeongsangang Ultra Marathon	100,00	×1
✓ 35	1/6/2013	1st Tokyo Shibamata 100 km	100,00	×1
✓ 36	26/3/2011	10th Jeju City 100 km	100,00	×1
✓ 37	27/6/2010	10th Nichinan Orochi 100 km Marathon	100,00	×1
✓ 38	16/8/2008	4th Busan Summer Beach 100 km Ultra Marathon	100,00	×1
✓ 39	2/8/2008	3rd Gangjin Ultra Marathon	100,00	×1
✓ 40	26/7/2008	1st Daegu Kumho River Ultra Marathon - 100km	100,00	×1
✓ 41	18/11/2007	8th Seoul Ultra Marathon 100 km	100,00	×1
✓ 42	13/1/2007	3rd Busan Beach Ultramarathon 100km	100,00	×1
✓ 43	19/11/2006	7th Seoul Ultra Marathon 100 km	100,00	×1
✓ 44	11/2/2006	2nd Gyeongnam Goseong Ultra Marathon	100,00	×1
✓ 45	26/6/2005	IAU 100km WC Yubetsu (20. Lake Saroma 100 km Ultramarathon)	100,00	×1
✓ 46	11/9/2004	29. IAU 100km WC Winschoten	100,00	×1
✓ 47	2/5/2004	100 km Ultra-Marathon Seoul	100,00	×1
✓ 48	16/11/2024	1st Malaysia Ultra-Trail by UTMB - MY100	99,00	×1
✓ 49	22/8/2015	2nd Ultravasan90	90,00	×1
✓ 50	26/4/2014	3rd Shizuoka to Yamanashi (STY)	88,00	×1
✓ 51	29/10/2016	6th IAU Trail WC Trans Peneda-Geres, Braga	85,00	×1
✓ 52	30/5/2015	5th IAU Trail WC Annecy (4ème La Maxi Race du Lac d'Annecy)	84,00	×1
✓ 53	29/5/2010	3rd Sundown Night 84km	84,00	×1
✓ 54	21/4/2019	5th Korea 80K	80,00	×1
✓ 55	12/10/2025	33th Hasetsune Cup - Japan Mountain Endurance Race	71,50	×1
✓ 56	8/10/2023	31th Hasetsune Cup - Japan Mountain Endurance Race	71,50	×1
✓ 57	7/10/2018	26th Hasetsune Cup - Japan Mountain Endurance Race	71,50	×1
✓ 58	8/10/2017	25th Hasetsune Cup - Japan Mountain Endurance Race	71,50	×1
✓ 59	9/10/2016	24th Hasetsune Cup - Japan Mountain Endurance Race	71,50	×1
✓ 60	31/10/2015	23rd Hasetsune Cup - Japan Mountain Endurance Race	71,50	×1
✓ 61	12/10/2014	22nd Hasetsune Cup - Japan Mountain Endurance Race	71,50	×1
✓ 62	9/10/2011	19th Hasetsune Cup - Japan Mountain Endurance Race	71,50	×1
✓ 63	11/10/2009	17th Hasetsune Cup - Japan Mountain Endurance Race	71,50	×1
✓ 64	8/10/2006	14th Hasetsune Cup - Japan Mountain Endurance Race	71,50	×1
✓ 65	12/10/2002	10th Hasetsune Cup - Japan Mountain Endurance Race	71,50	×1
✓ 66	28/9/2024	4th Jangsu Trail - September	70,00	—
✓ 67	3/6/2017	5th Geoje Jimaek Trail Run - 70 km	70,00	—
68	13/7/2019	10th Nozawa Onsen 4100D Mountain Trail	65,00	—
69	31/3/2019	1st Gurye Mt. Jiri Skyrace	64,00	—
70	24/4/2016	2nd Korea 50K	59,50	—
71	21/4/2017	3rd Korea 50K	58,00	—
72	10/7/2021	1st Jirisan Ultra Trail Run	55,00	—
73	16/10/2021	1st Seoul 100 Korea - SKY A1	54,00	—
74	6/9/2025	2nd Dynafit Taebaek Trail	50,00	—
75	7/9/2024	1st Dynafit Taebaek Trail	50,00	—
76	8/6/2024	11th Geoje Jimaek Trail Run - 50 km	50,00	—
77	27/4/2024	9th Korea 50K	50,00	—
78	3/6/2023	10th Geoje Jimaek Trail Run - 50 km	50,00	—
79	17/10/2021	1st Seoul 100 Korea - SKY B	50,00	—
80	16/12/2017	5th The North Face 50 Hong Kong	50,00	—
81	7/6/2026	2nd korea 50k Chuncheon	48,00	—
82	23/5/2021	27th Jirisan Flower Stalk	48,00	—
83	14/8/2016	17th Jirisan Ultra Marathon	47,00	—
84	27/10/2022	6th High Trail Nine Peaks - 5 Peaks	45,00	—