Chun-Jah (조춘자) Jo

ID 204876

Born : 1965 Cat. W60 Ultrarunner since 2005

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 ?

South Korea

Taiwan

24,5%

Rank quotient ?This runner's calculation uses 73 eligible race(s): Σ(rank − 1) = 2 722; Σ finishers = 11 117. 2 722 / 11 117 × 100 = 24.49%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed73

Km — ultra races10 188 km

> 100 km26

> 160 km12

> 200 km10

Longest race622,0 km

8th Trans Korea 622K South To North — 2/7/2017

Km per year (ultra races)

100

2022

100

2023

302

2024

102

2025

100

2026

Race types (share of distance)

Road87,4%

Trail12,6%

Wins & podiums (ultra)

🏆 Win0

🏆 Win F29

🏅 Top 33

🏅 Top 3 F50

Longest winning streak0

Current streak0

Records

100 km9h02'43 50 mi13h40'24 100 mi22h56'00 12 h107,45 km

HISTORY

73 race(s)

Date		Race	Perf.	Rk
2026
05.06	100km	21st Water Love Nagdong River Ultramarathon 100 km	12:59:28 h	4
2025
06.09	102km	19th Suncheon Bay 100 km Ultramarathon	13:52:00 h	39
2024
28.09	100km	5th Cheonan Samgeori Ultramarathon - 100km	14:12:12 h	53
07.09	102km	18th Suncheon Bay 100 km Ultramarathon	14:49:00 h	51
24.02	100km	19th Busan Beach Ultramarathon 100km	15:19:00 h	108
2023
04.03	100km	18th Busan Beach Ultramarathon 100km	15:34:00 h	109
2022
24.09	100km	3rd Cheonan Samgeori Ultramarathon - 100km	16:09:09 h	104
2020
05.06	104km	15th Water Love Nagdong River Ultramarathon 104 km	13:09:00 h	5
11.01	100km	16th Busan Beach Ultramarathon 100km	14:34:00 h	93
2019
12.10	101km	13th Youngdong Dried Persimmon Ultramarathon	14:34:00 h	84
19.09	308km	20th Trans Korea 308 km West to East	2d 05:39:00 h	4
07.09	100km	13th Suncheon Bay 100 km Ultramarathon	13:40:07 h	19
31.08	102km	13th Incheon Kanghwa Ultramarathon Festival - 100 km	11:33:00 h	14
14.04	100km	17th Cheongnamdae 100km Ultra Marathon	14:37:00 h	255
06.04	100km	7th SeJong Ultramarathon	11:37:00 h	12
2018
07.10	105km	1st Cheonan Samgeori Ultramarathon - 105km	14:55:00 h	118
01.09	100km	12th Suncheon Bay 100 km Ultramarathon	13:26:20 h	34
25.08	102km	12th Incheon Kanghwa Ultramarathon Festival - 100 km	12:23:00 h	16
28.07	100km	1st Tongyeong Ultra Marathon - 100km	15:37:00 h	142
12.05	100km	13th Daejeon Yusung Hot spring Ultramarathon	15:25:26 h	74
05.05	12h	KUMF 12H Cup	107.450 km	3 🥉
27.04	222km	14th Pilgrimage to the Holy Land 222 km Ultramarathon	40:48:00 h	20
21.04	100km	8th Budda 108K Ultramarathon	13:11:07 h	13
13.04	246km	4th Race Across Taiwan Nonstop 246km	40:42:52 h	15
10.03	100km	17th Jeju City 100 km	11:43:00 h	12
03.03	100km	14th Busan Beach Ultramarathon 100km	11:51:00 h	10
2017
14.10	100km	5th Transjeju Int. Trail Run 100	18:02:24 h	31
21.09	312km	18th Trans Korea 312 km West to East	2d 10:50:00 h	13
09.09	100km	11th Suncheon Bay 100 km Ultramarathon	13:24:33 h	37
26.08	102km	11th Incheon Kanghwa Ultramarathon Festival - 100 km	13:19:00 h	56
12.08	100km	2nd Yang Yang Int. Trailrun 100km	13:30:00 h	13
05.08	100km	4th Geumcheongu Ultramarathon 100 km	12:51:00 h	10
02.07	622km	8th Trans Korea 622K South To North	5d 15:11:00 h	3 🥉
17.06	100km	8th Ulsan Taewha River 100 km Ultramarathon	12:17:55 h	44
10.06	100km	15th Gwangju 100km Ultra Marathon	13:55:00 h	56
02.06	104km	12th Water Love Nagdong River Ultramarathon 104 km	15:47:00 h	13
13.05	100km	12th Daejeon Yusung Hot spring Ultramarathon	14:55:00 h	90
08.04	100km	15th Cheongnamdae 100km Ultra Marathon	14:25:00 h	220
2016
08.10	101km	10th Youngdong Dried Persimmon Ultramarathon	11:27:04 h	15
22.09	312km	17th Trans Korea 312 km West to East	2d 03:26:00 h	3 🥉
03.09	100km	2nd Seomjingang 100 km	14:01:00 h	4
27.08	102km	10th Incheon Kanghwa Ultramarathon Festival - 100 km	12:06:11 h	17
13.08	103km	1st Yang Yang Int. Trailrun 100km	16:15:00 h	18
06.08	100km	3rd Geumcheongu Ultramarathon	11:46:00 h	8
14.05	100km	11th Daejeon Yusung Hot spring Ultramarathon	14:34:00 h	46
23.04	50mi	15th Jeju-do Trail 50 Mile	13:40:24 h	14
09.04	100km	14th Cheongnamdae 100km Ultra Marathon	13:24:00 h	88
26.03	100km	5th SeJong Ultramarathon	12:10:00 h	29
20.02	100km	12th Busan Beach Ultramarathon 100km	13:03:00 h	29
2015
31.10	100km	9th Suncheon Bay 100 km Ultramarathon	13:46:20 h	44
10.10	101km	9th Youngdong Dried Persimmon Ultramarathon	11:19:00 h	12
17.09	312km	16th Trans Korea 312 km West to East	2d 10:34:00 h	16
06.09	100mi	1st Seomjingang 100 mile	22:56:00 h	5
29.08	100km	9th Incheon Kanghwa Ultramarathon Festival	13:29:00 h	72
15.08	100km	11th Busan Summer Beach 100 km Ultra Marathon	11:49:33 h	23
08.08	100km	2nd Geumcheongu Ultramarathon	12:03:00 h	13
25.07	100km	13th Gwangju 100km Ultra Marathon	11:51:50 h	8
2013
19.05	56km	9th Jirisan Ultra Marathon	12:23:00 h	5
06.04	100km	12th Jeju City 100 km	9:09:11 h	5
2012
10.11	100km	KUMF 100km Cup	9:02:43 h	7
08.07	537km	6th Trans Korea 537K South to North	4d 21:19:00 h	7
2011
22.09	308km	12th Trans Korea 308 km West to East	46:34:00 h	5
17.09	100km	8. Yangyang Song-I 100 km Ultramarathon	11:42:00 h	6
12.07	622km	5th Trans Korea 622K South To North	6d 03:12:00 h	24
05.06	200km	6th Mulsarang Nagdong 200km Ultra Marathon	29:50:00 h	8
07.05	100km	4th Pilgrimage To the Holy Land 100km Ultramarathon	10:58:00 h	4
2010
10.04	100km	8th Cheongnamdae 100km Ultra Marathon	10:32:00 h	8
2009
12.07	51km	1st Seoul-Chuncheon Expressway Opening Ceremony - 51km	3:56:39 h	17
2008
11.10	100km	2nd Youngdong Dried Persimmon Ultramarathon	11:03:57 h	6
2007
14.04	100km	5th Cheongnamdae 100km Ultra Marathon	12:42:00 h	99
2006
15.04	100km	4th Cheongnamdae 100km Ultra Marathon	11:35:00 h	48
2005
03.09	100km	2. Yangyang Song-I 100 km Ultramarathon	14:38:32 h	12
09.04	100km	3rd Cheongnamdae 100km Ultra Marathon	12:29:00 h	73

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	2/7/2017	8th Trans Korea 622K South To North	622,00	×6
✓ 2	12/7/2011	5th Trans Korea 622K South To North	622,00	×6
✓ 3	8/7/2012	6th Trans Korea 537K South to North	537,00	×5
✓ 4	21/9/2017	18th Trans Korea 312 km West to East	312,00	×3
✓ 5	22/9/2016	17th Trans Korea 312 km West to East	312,00	×3
✓ 6	17/9/2015	16th Trans Korea 312 km West to East	312,00	×3
✓ 7	19/9/2019	20th Trans Korea 308 km West to East	308,00	×3
✓ 8	22/9/2011	12th Trans Korea 308 km West to East	308,00	×3
✓ 9	13/4/2018	4th Race Across Taiwan Nonstop 246km	246,00	×2
✓ 10	27/4/2018	14th Pilgrimage to the Holy Land 222 km Ultramarathon	222,00	×2
✓ 11	5/6/2011	6th Mulsarang Nagdong 200km Ultra Marathon	200,00	×2
✓ 12	6/9/2015	1st Seomjingang 100 mile	160,93	×1
✓ 13	5/5/2018	KUMF 12H Cup	107,45	×1
✓ 14	7/10/2018	1st Cheonan Samgeori Ultramarathon - 105km	105,00	×1
✓ 15	5/6/2020	15th Water Love Nagdong River Ultramarathon 104 km	104,00	×1
✓ 16	2/6/2017	12th Water Love Nagdong River Ultramarathon 104 km	104,00	×1
✓ 17	13/8/2016	1st Yang Yang Int. Trailrun 100km	103,00	×1
✓ 18	6/9/2025	19th Suncheon Bay 100 km Ultramarathon	102,00	×1
✓ 19	7/9/2024	18th Suncheon Bay 100 km Ultramarathon	102,00	×1
✓ 20	31/8/2019	13th Incheon Kanghwa Ultramarathon Festival - 100 km	102,00	×1
✓ 21	25/8/2018	12th Incheon Kanghwa Ultramarathon Festival - 100 km	102,00	×1
✓ 22	26/8/2017	11th Incheon Kanghwa Ultramarathon Festival - 100 km	102,00	×1
✓ 23	27/8/2016	10th Incheon Kanghwa Ultramarathon Festival - 100 km	102,00	×1
✓ 24	12/10/2019	13th Youngdong Dried Persimmon Ultramarathon	101,00	×1
✓ 25	8/10/2016	10th Youngdong Dried Persimmon Ultramarathon	101,00	×1
✓ 26	10/10/2015	9th Youngdong Dried Persimmon Ultramarathon	101,00	×1
✓ 27	5/6/2026	21st Water Love Nagdong River Ultramarathon 100 km	100,00	×1
✓ 28	28/9/2024	5th Cheonan Samgeori Ultramarathon - 100km	100,00	×1
✓ 29	24/2/2024	19th Busan Beach Ultramarathon 100km	100,00	×1
✓ 30	4/3/2023	18th Busan Beach Ultramarathon 100km	100,00	×1
✓ 31	24/9/2022	3rd Cheonan Samgeori Ultramarathon - 100km	100,00	×1
✓ 32	11/1/2020	16th Busan Beach Ultramarathon 100km	100,00	×1
✓ 33	7/9/2019	13th Suncheon Bay 100 km Ultramarathon	100,00	×1
✓ 34	14/4/2019	17th Cheongnamdae 100km Ultra Marathon	100,00	×1
✓ 35	6/4/2019	7th SeJong Ultramarathon	100,00	×1
✓ 36	1/9/2018	12th Suncheon Bay 100 km Ultramarathon	100,00	×1
✓ 37	28/7/2018	1st Tongyeong Ultra Marathon - 100km	100,00	×1
✓ 38	12/5/2018	13th Daejeon Yusung Hot spring Ultramarathon	100,00	×1
✓ 39	21/4/2018	8th Budda 108K Ultramarathon	100,00	×1
✓ 40	10/3/2018	17th Jeju City 100 km	100,00	×1
✓ 41	3/3/2018	14th Busan Beach Ultramarathon 100km	100,00	×1
✓ 42	14/10/2017	5th Transjeju Int. Trail Run 100	100,00	×1
✓ 43	9/9/2017	11th Suncheon Bay 100 km Ultramarathon	100,00	×1
✓ 44	12/8/2017	2nd Yang Yang Int. Trailrun 100km	100,00	×1
✓ 45	5/8/2017	4th Geumcheongu Ultramarathon 100 km	100,00	×1
✓ 46	17/6/2017	8th Ulsan Taewha River 100 km Ultramarathon	100,00	×1
✓ 47	10/6/2017	15th Gwangju 100km Ultra Marathon	100,00	×1
✓ 48	13/5/2017	12th Daejeon Yusung Hot spring Ultramarathon	100,00	×1
✓ 49	8/4/2017	15th Cheongnamdae 100km Ultra Marathon	100,00	×1
✓ 50	3/9/2016	2nd Seomjingang 100 km	100,00	×1
✓ 51	6/8/2016	3rd Geumcheongu Ultramarathon	100,00	×1
✓ 52	14/5/2016	11th Daejeon Yusung Hot spring Ultramarathon	100,00	×1
✓ 53	9/4/2016	14th Cheongnamdae 100km Ultra Marathon	100,00	×1
✓ 54	26/3/2016	5th SeJong Ultramarathon	100,00	×1
✓ 55	20/2/2016	12th Busan Beach Ultramarathon 100km	100,00	×1
✓ 56	31/10/2015	9th Suncheon Bay 100 km Ultramarathon	100,00	×1
✓ 57	29/8/2015	9th Incheon Kanghwa Ultramarathon Festival	100,00	×1
✓ 58	15/8/2015	11th Busan Summer Beach 100 km Ultra Marathon	100,00	×1
✓ 59	8/8/2015	2nd Geumcheongu Ultramarathon	100,00	×1
✓ 60	25/7/2015	13th Gwangju 100km Ultra Marathon	100,00	×1
✓ 61	6/4/2013	12th Jeju City 100 km	100,00	×1
✓ 62	10/11/2012	KUMF 100km Cup	100,00	×1
✓ 63	17/9/2011	8. Yangyang Song-I 100 km Ultramarathon	100,00	×1
✓ 64	7/5/2011	4th Pilgrimage To the Holy Land 100km Ultramarathon	100,00	×1
✓ 65	10/4/2010	8th Cheongnamdae 100km Ultra Marathon	100,00	×1
✓ 66	11/10/2008	2nd Youngdong Dried Persimmon Ultramarathon	100,00	×1
✓ 67	14/4/2007	5th Cheongnamdae 100km Ultra Marathon	100,00	×1
✓ 68	15/4/2006	4th Cheongnamdae 100km Ultra Marathon	100,00	×1
✓ 69	3/9/2005	2. Yangyang Song-I 100 km Ultramarathon	100,00	×1
✓ 70	9/4/2005	3rd Cheongnamdae 100km Ultra Marathon	100,00	×1
✓ 71	23/4/2016	15th Jeju-do Trail 50 Mile	80,47	—
72	19/5/2013	9th Jirisan Ultra Marathon	56,00	—
73	12/7/2009	1st Seoul-Chuncheon Expressway Opening Ceremony - 51km	51,00	—