Colin Bosch

Born : 1961 Cat. M65 Ultrarunner since 1990

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 Africa

43,8%

Rank quotient ?This runner's calculation uses 47 eligible race(s): Σ(rank − 1) = 178 537; Σ finishers = 407 979. 178 537 / 407 979 × 100 = 43.76%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed48

Km — ultra races3 916 km

> 100 km7

> 160 km6

Longest race160,9 km

36th Washie 100 Miler — 27/7/2012

Km per year (ultra races)

146

2022

143

2023

143

2024

146

2025

2026

Race types (share of distance)

Road96,1%

Trail1,3%

Stage2,6%

Wins & podiums (ultra)

🏆 Win0

🏆 Win M0

🏅 Top 32

🏅 Top 3 M2

Longest winning streak0

Current streak0

Records

100 mi16h42'06

HISTORY

48 race(s) · 12 split(s) nested

Date		Race	Perf.	Rk
2026
05.04	56km	56th Two Oceans Marathon	6:35:08 h	8226
05.04	56km	56th Two Oceans Marathon - 50km Split	5:51:28 h	8210
2025
08.06	90km	98th Comrades Marathon - Down Run	11:29:00 h	13921
06.04	56km	55th Two Oceans Marathon	6:43:21 h	8910
06.04	50km	55th Two Oceans Marathon - 50km Split	5:35:00 h	6525
2024
09.06	87km	97th Comrades Marathon - Up Run	10:54:41 h	10689
13.04	56km	54th Two Oceans Marathon	5:17:27 h	2267
13.04	50km	54th Two Oceans Marathon - 50km Split	4:47:27 h	2507
2023
11.06	87km	96th Comrades Marathon - Down Run	10:39:51 h	8784
15.04	56km	53th Two Oceans Marathon	6:13:28 h	4767
15.04	50km	53th Two Oceans Marathon - 50km Split	5:34:00 h	4769
2022
28.08	90km	95th Comrades Marathon - Down Run	11:18:13 h	8414
16.04	56km	52th Two Oceans Marathon	6:15:31 h	2573
16.04	50km	52th Two Oceans Marathon - 50km Split	5:21:48 h	2202
2019
09.06	87km	94th Comrades Marathon - Up Run	11:31:09 h	12405
20.04	56km	50th Two Oceans Marathon	6:57:03 h	10052
20.04	50km	50th Two Oceans Marathon - 50km Split	6:04:55 h	9374
2018
10.06	90km	93rd Comrades Marathon - Down Run	11:17:42 h	11440
31.03	56km	49th Two Oceans Marathon	5:39:56 h	2833
31.03	50km	49th Two Oceans Marathon - 50km Split	5:06:29 h	3143
2017
04.06	87km	92nd Comrades Marathon - Up Run	10:57:18 h	8230
15.04	56km	48th Two Oceans Marathon	5:15:42 h	1767
15.04	50km	48th Two Oceans Marathon - 50km Split	4:38:54 h	1714
2016
29.05	89km	91st Comrades Marathon - Down Run	10:43:41 h	7566
26.03	56km	47th Two Oceans Marathon	5:52:50 h	3754
26.03	50km	47th Two Oceans Marathon - 50km Split	5:16:07 h	3820
2015
04.04	56km	46th Two Oceans Marathon	5:54:38 h	3908
04.04	50km	46th Two Oceans Marathon - 50km Split	5:17:34 h	3930
2014
18.04	56km road race	45th Two Oceans Marathon	5:32:52 h	2404
18.04	50km	45th Two Oceans Marathon - 50km Split	4:56:18 h	2427
2013
02.06	87km road race	88th Comrades Marathon - Up Run	9:58:33 h	3237
30.03	56km road race	44th Two Oceans Marathon	4:57:34 h	1291
30.03	50km road race	44th Two Oceans Marathon - 50km Split (RSA)	4:29:09 h	1479
2012
27.07	100mi	36th Washie 100 Miler	23:08:18 h	35
03.06	89km road race	87th Comrades Marathon - Down Run	11:32:05 h	9486
2011
15.10	102.6km/2stages	Merrell Hobbit 100 - Amatola Stage Trail Run	25:27:11 h	27
15.07	100mi	35th Washie 100 Miler	20:01:28 h	12
23.04	50km road race	42nd Two Oceans Marathon - 50km Split	4:05:48 h	650
2009
18.07	52km	21st Rhodes 52 km Trail Run	8:48:25 h	260
2007
27.07	100mi	31st Washie 100 Miler	18:12:06 h	6
28.04	60km	Clover Settlers 60 km Ultra	4:55:57 h	63
2006
14.07	100mi	30th Washie 100 Miler	17:19:09 h	3 🥉
2005
22.07	100mi	29th Washie 100 Miler	16:42:06 h	3 🥉
26.03	56km road race	36th Two Oceans Marathon	4:17:33 h	445
2004
30.07	100mi	28th Washie 100 Miler	19:09:58 h	9
16.06	87km road race	79th Comrades Marathon - Up Run	8:38:37 h	1656
2003
16.06	89km road race	78th Comrades Marathon - Down Run	8:53:05 h	2750
19.04	56km road race	34th Two Oceans Marathon	4:43:19 h	945
2002
17.06	87km road race	77th Comrades Marathon - Up Run	8:46:32 h	2097
30.03	56km	33rd Two Oceans Marathon	4:44:47 h	933
2000
16.06	87km road race	75th Comrades Marathon - Up Run	8:13:30 h	1614
1994
31.05	87km	69th Comrades Marathon - Up Run	8:29:24 h	1872
1993
31.05	89km	68th Comrades Marathon - Down Run	8:27:01 h	2275
10.04	56km	24th Two Oceans Marathon	4:31:04 h	1216
1992
30.05	87km	67th Comrades Marathon - Up Run	8:18:20 h	1781
18.04	56km	23rd Two Oceans Marathon	4:23:09 h	780
1991
31.05	89km	66th Comrades Marathon - Down Run	9:24:54 h	5026
30.03	56km	22nd Two Oceans Marathon	5:29:21 h	4080
1990
31.05	87km road race	65th Comrades Marathon - Up Run	8:46:30 h	2638
14.04	56km	21st Two Oceans Marathon	4:29:23 h	1134

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	27/7/2012	36th Washie 100 Miler	160,93	×3
✓ 2	15/7/2011	35th Washie 100 Miler	160,93	×3
✓ 3	27/7/2007	31st Washie 100 Miler	160,93	×3
✓ 4	14/7/2006	30th Washie 100 Miler	160,93	×3
✓ 5	22/7/2005	29th Washie 100 Miler	160,93	×3
✓ 6	30/7/2004	28th Washie 100 Miler	160,93	×3
✓ 7	15/10/2011	Merrell Hobbit 100 - Amatola Stage Trail Run	102,60	×1
✓ 8	8/6/2025	98th Comrades Marathon - Down Run	90,00	×1
✓ 9	28/8/2022	95th Comrades Marathon - Down Run	90,00	×1
✓ 10	10/6/2018	93rd Comrades Marathon - Down Run	90,00	×1
✓ 11	29/5/2016	91st Comrades Marathon - Down Run	89,00	×1
✓ 12	3/6/2012	87th Comrades Marathon - Down Run (RSA)	89,00	×1
✓ 13	16/6/2003	78th Comrades Marathon - Down Run (RSA)	89,00	×1
✓ 14	31/5/1993	68th Comrades Marathon - Down Run	89,00	×1
✓ 15	31/5/1991	66th Comrades Marathon - Down Run	89,00	×1
✓ 16	9/6/2024	97th Comrades Marathon - Up Run	87,00	×1
✓ 17	11/6/2023	96th Comrades Marathon - Down Run	87,00	×1
✓ 18	9/6/2019	94th Comrades Marathon - Up Run	87,00	×1
✓ 19	4/6/2017	92nd Comrades Marathon - Up Run	87,00	×1
✓ 20	2/6/2013	88th Comrades Marathon - Up Run (RSA)	87,00	×1
✓ 21	16/6/2004	79th Comrades Marathon - Up Run (RSA)	87,00	×1
✓ 22	17/6/2002	77th Comrades Marathon - Up Run (RSA)	87,00	×1
✓ 23	16/6/2000	75th Comrades Marathon - Up Run (RSA)	87,00	×1
✓ 24	31/5/1994	69th Comrades Marathon - Up Run	87,00	×1
✓ 25	30/5/1992	67th Comrades Marathon - Up Run	87,00	×1
✓ 26	31/5/1990	65th Comrades Marathon - Up Run (RSA)	87,00	×1
✓ 27	28/4/2007	Clover Settlers 60 km Ultra	60,00	×1
✓ 28	5/4/2026	56th Two Oceans Marathon	56,00	×1
✓ 29	6/4/2025	55th Two Oceans Marathon	56,00	×1
✓ 30	13/4/2024	54th Two Oceans Marathon	56,00	×1
✓ 31	15/4/2023	53th Two Oceans Marathon	56,00	×1
✓ 32	16/4/2022	52th Two Oceans Marathon	56,00	×1
✓ 33	20/4/2019	50th Two Oceans Marathon	56,00	×1
✓ 34	31/3/2018	49th Two Oceans Marathon	56,00	×1
✓ 35	15/4/2017	48th Two Oceans Marathon	56,00	×1
✓ 36	26/3/2016	47th Two Oceans Marathon	56,00	×1
✓ 37	4/4/2015	46th Two Oceans Marathon	56,00	×1
✓ 38	18/4/2014	45th Two Oceans Marathon (RSA)	56,00	×1
✓ 39	30/3/2013	44th Two Oceans Marathon (RSA)	56,00	×1
✓ 40	26/3/2005	36th Two Oceans Marathon (RSA)	56,00	×1
✓ 41	19/4/2003	34th Two Oceans Marathon (RSA)	56,00	×1
✓ 42	30/3/2002	33rd Two Oceans Marathon	56,00	×1
✓ 43	10/4/1993	24th Two Oceans Marathon	56,00	×1
✓ 44	18/4/1992	23rd Two Oceans Marathon	56,00	×1
✓ 45	30/3/1991	22nd Two Oceans Marathon	56,00	×1
✓ 46	14/4/1990	21st Two Oceans Marathon	56,00	×1
✓ 47	18/7/2009	21st Rhodes 52 km Trail Run	52,00	—