Robert Button

Born : 1959 Cat. M65 Ultrarunner since 1983

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

62,5%

Rank quotient ?This runner's calculation uses 70 eligible race(s): Σ(rank − 1) = 255 856; Σ finishers = 409 414. 255 856 / 409 414 × 100 = 62.49%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed70

Km — ultra races5 342 km

> 100 km7

> 160 km7

Longest race160,9 km

36th Washie 100 Miler — 27/7/2012

Km per year (ultra races)

146

2022

2023

193

2024

2025

2026

Race types (share of distance)

Road99,1%

Trail0,9%

Records

50 km4h46'28 100 km12h39'08 100 mi19h44'08

HISTORY

72 race(s) · 5 split(s) nested

Date		Race	Perf.	Rk
2025
06.04	50km	55th Two Oceans Marathon - 50km Split	6:13:58 h	10692
2024
09.06	87km	97th Comrades Marathon - Up Run	11:30:00 h	13744
13.04	56km	54th Two Oceans Marathon	6:15:49 h	6451
13.04	50km	54th Two Oceans Marathon - 50km Split	5:33:20 h	6338
22.03	50km	20th Addo Elephant 50 km Trail Run	13:16:04 h	173
2022
28.08	90km	95th Comrades Marathon - Down Run	11:47:17 h	10468
16.04	56km	52th Two Oceans Marathon	6:46:31 h	3643
16.04	50km	52th Two Oceans Marathon - 50km Split	5:59:49 h	3610
2019
09.06	87km	94th Comrades Marathon - Up Run	11:21:03 h	11339
20.04	56km	50th Two Oceans Marathon	6:11:39 h	5537
20.04	50km	50th Two Oceans Marathon - 50km Split	5:30:57 h	5712
2015
04.04	56km	46th Two Oceans Marathon	6:27:06 h	6056
04.04	50km	46th Two Oceans Marathon - 50km Split	5:47:39 h	6164
21.02	50km	Bay Ultra 50 km	5:41:34 h	177
2012
27.07	100mi	36th Washie 100 Miler	23:51:15 h	42
03.06	89km road race	87th Comrades Marathon - Down Run	11:38:46 h	10073
28.04	50km	34th Bruintjieshoogte Ultra Marathon 50km	5:51:39 h	124
07.04	56km road race	43rd Two Oceans Marathon	6:16:55 h	5314
07.04	50km road race	43rd Two Oceans Marathon - 50km Split (RSA)	5:35:26 h	5386
03.03	50km	29th Bay Ultra 50 km	5:56:54 h	227
2011
23.04	50km road race	42nd Two Oceans Marathon - 50km Split	5:52:03 h	5039
19.03	50km	33rd Bruintjieshoogte Ultra Marathon 50km	5:46:08 h	115
2010
27.02	50km	27th Bay Ultra 50 km	5:36:16 h	282
2009
19.09	100km	Bay to Bay 100 km Challenge	12:39:08 h	12
11.07	100mi	33rd Washie 100 Miler	21:45:50 h	15
21.02	50km	26th Bay Ultra 50 km	5:06:36 h	132
2008
08.11	100km	Bay to Bay 100 km Challenge	13:25:18 h	59
18.07	100mi	32nd Washie 100 Miler	22:20:15 h	15
09.02	50km	25th Bay Ultra 50 km	4:52:40 h	121
2007
27.07	100mi	31st Washie 100 Miler	20:33:28 h	16
12.05	50km	24th Bay Ultra 50 km	4:54:13 h	132
28.04	60km	Clover Settlers 60 km Ultra	5:48:06 h	140
2006
29.04	60km	Clover Settlers 60 km Ultra	7:08:00 h	145
2005
26.03	56km road race	36th Two Oceans Marathon	5:57:05 h	4443
19.02	50km	23rd Bay Ultra 50 km	4:47:56 h	124
2004
30.07	100mi	28th Washie 100 Miler	23:17:52 h	30
16.06	87km road race	79th Comrades Marathon - Up Run	11:39:06 h	8976
10.04	56km road race	35th Two Oceans Marathon	5:41:46 h	4042
21.02	50km	22nd Bay Ultra 50 km	5:07:59 h	251
2003
18.07	100mi	27th Washie 100 Miler	19:44:08 h	12
16.06	89km road race	78th Comrades Marathon - Down Run	9:39:29 h	4350
19.04	56km road race	34th Two Oceans Marathon	5:21:57 h	2204
22.02	50km	21st Bay Ultra 50 km	4:55:48 h	189
2002
30.03	56km	33rd Two Oceans Marathon	5:55:15 h	4162
23.02	50km	20th Bay Ultra 50 km	5:16:12 h	266
2001
16.06	89km road race	76th Comrades Marathon - Down Run	10:20:58 h	6812
14.04	56km	32rd Two Oceans Marathon	5:48:24 h	4046
2000
14.07	100mi	24th Washie 100 Miler	20:54:05 h	33
16.06	87km road race	75th Comrades Marathon - Up Run	10:45:30 h	10850
13.05	60km	Blue Ink Settlers 60 km Marathon	6:18:13 h	208
22.04	56km	31st Two Oceans Marathon	5:34:21 h	3804
19.02	50km	19th Bay Ultra 50 km	4:46:28 h	224
1999
16.06	89km	74th Comrades Marathon - Down Run	9:47:25 h	5255
03.04	56km	30th Two Oceans Marathon	5:44:37 h	4437
1998
16.06	87km	73rd Comrades Marathon - Up Run	10:09:32 h	5860
11.04	56km	29th Two Oceans Marathon	5:13:36 h	2627
1997
16.06	89km	72nd Comrades Marathon - Down Run	10:13:27 h	6852
29.03	56km	28th Two Oceans Marathon	5:56:19 h	6301
1996
17.06	87km	71st Comrades Marathon - Up Run	10:29:26 h	8475
06.04	56km	27th Two Oceans Marathon	5:41:59 h	5050
1995
20.05	89km	70th Comrades Marathon - Down Run	9:51:28 h	4799
15.04	56km	26th Two Oceans Marathon	4:50:18 h	1725
1994
31.05	87km	69th Comrades Marathon - Up Run	10:08:11 h	5916
02.04	56km	25th Two Oceans Marathon	5:37:19 h	4907
1993
31.05	89km	68th Comrades Marathon - Down Run	10:28:59 h	8319
10.04	56km	24th Two Oceans Marathon	5:24:38 h	4316
1992
30.05	87km	67th Comrades Marathon - Up Run	10:31:52 h	8115
18.04	56km	23rd Two Oceans Marathon	5:42:39 h	5621
1990
31.05	87km road race	65th Comrades Marathon - Up Run	10:25:30 h	7502
14.04	56km	21st Two Oceans Marathon	5:39:31 h	5303
1988
31.05	87km	63rd Comrades Marathon - Up Run	9:43:46 h	5474
02.04	56km	19th Two Oceans Marathon	5:40:27 h	4434
1987
31.05	87km	62nd Comrades Marathon - Up Run	9:58:16 h	4706
18.04	56km	18th Two Oceans Marathon	5:16:32 h	2820
1986
31.05	89km	61st Comrades Marathon - Down Run	9:55:24 h	6349
1983
31.05	88km	58th Comrades Marathon - Up Run	8:02:57 h	975
02.04	56km	14th Two Oceans Marathon	3:56:59 h	210

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	×2
✓ 2	11/7/2009	33rd Washie 100 Miler	160,93	×2
✓ 3	18/7/2008	32nd Washie 100 Miler	160,93	×2
✓ 4	27/7/2007	31st Washie 100 Miler	160,93	×2
✓ 5	30/7/2004	28th Washie 100 Miler	160,93	×2
✓ 6	18/7/2003	27th Washie 100 Miler	160,93	×2
✓ 7	14/7/2000	24th Washie 100 Miler	160,93	×2
✓ 8	19/9/2009	Bay to Bay 100 km Challenge	100,00	×1
✓ 9	8/11/2008	Bay to Bay 100 km Challenge	100,00	×1
✓ 10	28/8/2022	95th Comrades Marathon - Down Run	90,00	×1
✓ 11	3/6/2012	87th Comrades Marathon - Down Run (RSA)	89,00	×1
✓ 12	16/6/2003	78th Comrades Marathon - Down Run (RSA)	89,00	×1
✓ 13	16/6/2001	76th Comrades Marathon - Down Run (RSA)	89,00	×1
✓ 14	16/6/1999	74th Comrades Marathon - Down Run	89,00	×1
✓ 15	16/6/1997	72nd Comrades Marathon - Down Run	89,00	×1
✓ 16	20/5/1995	70th Comrades Marathon - Down Run	89,00	×1
✓ 17	31/5/1993	68th Comrades Marathon - Down Run	89,00	×1
✓ 18	31/5/1986	61st Comrades Marathon - Down Run	89,00	×1
✓ 19	31/5/1983	58th Comrades Marathon - Up Run	88,00	×1
✓ 20	9/6/2024	97th Comrades Marathon - Up Run	87,00	×1
✓ 21	9/6/2019	94th Comrades Marathon - Up Run	87,00	×1
✓ 22	16/6/2004	79th Comrades Marathon - Up Run (RSA)	87,00	×1
✓ 23	16/6/2000	75th Comrades Marathon - Up Run (RSA)	87,00	×1
✓ 24	16/6/1998	73rd Comrades Marathon - Up Run	87,00	×1
✓ 25	17/6/1996	71st Comrades Marathon - Up Run	87,00	×1
✓ 26	31/5/1994	69th Comrades Marathon - Up Run	87,00	×1
✓ 27	30/5/1992	67th Comrades Marathon - Up Run	87,00	×1
✓ 28	31/5/1990	65th Comrades Marathon - Up Run (RSA)	87,00	×1
✓ 29	31/5/1988	63rd Comrades Marathon - Up Run	87,00	×1
✓ 30	31/5/1987	62nd Comrades Marathon - Up Run	87,00	×1
✓ 31	28/4/2007	Clover Settlers 60 km Ultra	60,00	×1
✓ 32	29/4/2006	Clover Settlers 60 km Ultra	60,00	×1
✓ 33	13/5/2000	Blue Ink Settlers 60 km Marathon	60,00	×1
✓ 34	13/4/2024	54th Two Oceans Marathon	56,00	×1
✓ 35	16/4/2022	52th Two Oceans Marathon	56,00	×1
✓ 36	20/4/2019	50th Two Oceans Marathon	56,00	×1
✓ 37	4/4/2015	46th Two Oceans Marathon	56,00	×1
✓ 38	7/4/2012	43rd Two Oceans Marathon (RSA)	56,00	×1
✓ 39	26/3/2005	36th Two Oceans Marathon (RSA)	56,00	×1
✓ 40	10/4/2004	35th 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	14/4/2001	32rd Two Oceans Marathon	56,00	×1
✓ 44	22/4/2000	31st Two Oceans Marathon	56,00	×1
✓ 45	3/4/1999	30th Two Oceans Marathon	56,00	×1
✓ 46	11/4/1998	29th Two Oceans Marathon	56,00	×1
✓ 47	29/3/1997	28th Two Oceans Marathon	56,00	×1
✓ 48	6/4/1996	27th Two Oceans Marathon	56,00	×1
✓ 49	15/4/1995	26th Two Oceans Marathon	56,00	×1
✓ 50	2/4/1994	25th Two Oceans Marathon	56,00	×1
✓ 51	10/4/1993	24th Two Oceans Marathon	56,00	×1
✓ 52	18/4/1992	23rd Two Oceans Marathon	56,00	×1
✓ 53	14/4/1990	21st Two Oceans Marathon	56,00	×1
✓ 54	2/4/1988	19th Two Oceans Marathon	56,00	×1
✓ 55	18/4/1987	18th Two Oceans Marathon	56,00	×1
✓ 56	2/4/1983	14th Two Oceans Marathon	56,00	×1
57	22/3/2024	20th Addo Elephant 50 km Trail Run	50,00	—
58	21/2/2015	Bay Ultra 50 km	50,00	—
59	28/4/2012	34th Bruintjieshoogte Ultra Marathon 50km	50,00	—
60	3/3/2012	29th Bay Ultra 50 km	50,00	—
61	19/3/2011	33rd Bruintjieshoogte Ultra Marathon 50km	50,00	—
62	27/2/2010	27th Bay Ultra 50 km	50,00	—
63	21/2/2009	26th Bay Ultra 50 km	50,00	—
64	9/2/2008	25th Bay Ultra 50 km	50,00	—
65	12/5/2007	24th Bay Ultra 50 km	50,00	—
66	19/2/2005	23rd Bay Ultra 50 km	50,00	—
67	21/2/2004	22nd Bay Ultra 50 km	50,00	—
68	22/2/2003	21st Bay Ultra 50 km	50,00	—
69	23/2/2002	20th Bay Ultra 50 km	50,00	—
70	19/2/2000	19th Bay Ultra 50 km	50,00	—