Geoffrey Preston

Born : 1946 Cat. M80 Ultrarunner since 1980

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

81,6%

Rank quotient ?This runner's calculation uses 54 eligible race(s): Σ(rank − 1) = 219 199; Σ finishers = 268 608. 219 199 / 268 608 × 100 = 81.61%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed54

Km — ultra races5 004 km

> 100 km13

> 160 km13

Longest race160,9 km

28th Washie 100 Miler — 30/7/2004

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road91,0%

Trail9,0%

Records

50 km7h21'44 50 mi11h31'14 100 mi21h22'21

HISTORY

54 race(s)

Date		Race	Perf.	Rk
2016
29.05	89km	91st Comrades Marathon - Down Run	11:38:24 h	11641
10.04	48km	Modern Athlete Irene Ultra	5:35:19 h	1033
2010
24.07	50mi	1st Griffin 50 Miler	11:31:14 h	6
2006
09.09	50km	14. Mont-Aux-Sources 50km Challenge	9:45:19 h	265
15.07	52km	18th Rhodes 52 km Trail Run	8:10:57 h	245
2005
10.09	50km	13. Mont-Aux-Sources 50km Challenge	9:50:31 h	242
2004
11.09	50km	12. Mont-Aux-Sources 50km Challenge	9:55:08 h	237
30.07	100mi	28th Washie 100 Miler	25:25:11 h	47
16.06	87km road race	79th Comrades Marathon - Up Run	11:51:07 h	9666
2003
13.09	50km	11. Mont-Aux-Sources 50km Challenge	9:34:12 h	248
18.07	100mi	27th Washie 100 Miler	24:34:16 h	40
2002
14.09	50km	10. Mont-Aux-Sources 50km Challenge	8:27:49 h	128
17.06	87km road race	77th Comrades Marathon - Up Run	10:58:27 h	8862
30.03	56km	33rd Two Oceans Marathon	6:27:10 h	5483
2001
01.09	50km	9. Mont-Aux-Sources 50km Challenge	7:21:44 h	145
10.07	100mi	25th Washie 100 Miler	25:43:55 h	59
14.04	56km	32rd Two Oceans Marathon	6:33:25 h	6217
2000
14.07	100mi	24th Washie 100 Miler	24:15:02 h	64
16.06	87km road race	75th Comrades Marathon - Up Run	10:49:53 h	11412
22.04	56km	31st Two Oceans Marathon	5:58:04 h	6141
1999
04.09	50km	7. Mont-Aux-Sources 50km Challenge	9:52:21 h	210
23.07	100mi	23rd Washie 100 Miler	24:47:59 h	94
16.06	89km	74th Comrades Marathon - Down Run	10:39:17 h	8814
03.04	56km	30th Two Oceans Marathon	6:26:22 h	6931
1998
05.09	50km	6. Mont-Aux-Sources 50km Challenge	8:53:14 h	147
1997
17.07	100mi	21st Washie 100 Miler	24:44:45 h	62
16.06	89km	72nd Comrades Marathon - Down Run	10:59:27 h	11331
29.03	56km	28th Two Oceans Marathon	5:57:10 h	6403
1996
26.07	100mi	20th Washie 100 Miler	25:06:56 h	99
1995
07.07	100mi	19th Washie 100 Miler	23:29:44 h	68
20.05	89km	70th Comrades Marathon - Down Run	10:49:32 h	9049
15.04	56km	26th Two Oceans Marathon	5:56:06 h	6088
1994
22.07	100mi	18th Washie 100 Miler	21:31:47 h	35
31.05	87km	69th Comrades Marathon - Up Run	10:49:15 h	9175
1993
02.07	100mi	17th Washie 100 Miler	23:15:25 h	42
31.05	89km	68th Comrades Marathon - Down Run	9:58:03 h	6395
10.04	56km	24th Two Oceans Marathon	5:57:16 h	6993
1992
10.07	100mi	16th Washie 100 Miler	21:22:21 h	41
30.05	87km	67th Comrades Marathon - Up Run	10:28:39 h	7864
18.04	56km	23rd Two Oceans Marathon	5:42:43 h	5626
1991
26.07	100mi	15th Washie 100 Miler	21:43:22 h	55
31.05	89km	66th Comrades Marathon - Down Run	9:55:31 h	6911
1990
06.07	100mi	14th Washie 100 Miler	22:10:43 h	42
31.05	87km road race	65th Comrades Marathon - Up Run	10:57:03 h	10128
14.04	56km	21st Two Oceans Marathon	5:55:56 h	6605
1989
31.05	89km	64th Comrades Marathon - Down Run	10:54:42 h	10118
25.03	56km	20th Two Oceans Marathon	5:59:42 h	6035
1986
31.05	89km	61st Comrades Marathon - Down Run	10:03:31 h	6742
1985
31.05	88km	60th Comrades Marathon - Up Run	10:35:13 h	6869
1984
01.06	90km	59th Comrades Marathon - Down Run	9:02:19 h	3004
1983
31.05	88km	58th Comrades Marathon - Up Run	10:54:37 h	5269
1982
31.05	91km	57th Comrades Marathon - Down Run	9:29:02 h	2667
1981
01.06	90km	56th Comrades Marathon - Up Run	10:51:39 h	3569
1980
31.05	90km	55th Comrades Marathon - Down Run	10:32:00 h	3591

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	30/7/2004	28th Washie 100 Miler	160,93	×2
✓ 2	18/7/2003	27th Washie 100 Miler	160,93	×2
✓ 3	10/7/2001	25th Washie 100 Miler	160,93	×2
✓ 4	14/7/2000	24th Washie 100 Miler	160,93	×2
✓ 5	23/7/1999	23rd Washie 100 Miler	160,93	×2
✓ 6	17/7/1997	21st Washie 100 Miler	160,93	×2
✓ 7	26/7/1996	20th Washie 100 Miler	160,93	×2
✓ 8	7/7/1995	19th Washie 100 Miler	160,93	×2
✓ 9	22/7/1994	18th Washie 100 Miler	160,93	×2
✓ 10	2/7/1993	17th Washie 100 Miler	160,93	×2
✓ 11	10/7/1992	16th Washie 100 Miler	160,93	×2
✓ 12	26/7/1991	15th Washie 100 Miler	160,93	×2
✓ 13	6/7/1990	14th Washie 100 Miler	160,93	×2
✓ 14	31/5/1982	57th Comrades Marathon - Down Run	91,00	×1
✓ 15	1/6/1984	59th Comrades Marathon - Down Run	90,00	×1
✓ 16	1/6/1981	56th Comrades Marathon - Up Run	90,00	×1
✓ 17	31/5/1980	55th Comrades Marathon - Down Run	90,00	×1
✓ 18	29/5/2016	91st Comrades Marathon - Down Run	89,00	×1
✓ 19	16/6/1999	74th Comrades Marathon - Down Run	89,00	×1
✓ 20	16/6/1997	72nd Comrades Marathon - Down Run	89,00	×1
✓ 21	20/5/1995	70th Comrades Marathon - Down Run	89,00	×1
✓ 22	31/5/1993	68th Comrades Marathon - Down Run	89,00	×1
✓ 23	31/5/1991	66th Comrades Marathon - Down Run	89,00	×1
✓ 24	31/5/1989	64th Comrades Marathon - Down Run	89,00	×1
✓ 25	31/5/1986	61st Comrades Marathon - Down Run	89,00	×1
✓ 26	31/5/1985	60th Comrades Marathon - Up Run	88,00	×1
✓ 27	31/5/1983	58th Comrades Marathon - Up Run	88,00	×1
✓ 28	16/6/2004	79th Comrades Marathon - Up Run (RSA)	87,00	×1
✓ 29	17/6/2002	77th Comrades Marathon - Up Run (RSA)	87,00	×1
✓ 30	16/6/2000	75th Comrades Marathon - Up Run (RSA)	87,00	×1
✓ 31	31/5/1994	69th Comrades Marathon - Up Run	87,00	×1
✓ 32	30/5/1992	67th Comrades Marathon - Up Run	87,00	×1
✓ 33	31/5/1990	65th Comrades Marathon - Up Run (RSA)	87,00	×1
✓ 34	24/7/2010	1st Griffin 50 Miler	80,47	×1
✓ 35	30/3/2002	33rd Two Oceans Marathon	56,00	×1
✓ 36	14/4/2001	32rd Two Oceans Marathon	56,00	×1
✓ 37	22/4/2000	31st Two Oceans Marathon	56,00	×1
✓ 38	3/4/1999	30th Two Oceans Marathon	56,00	×1
✓ 39	29/3/1997	28th Two Oceans Marathon	56,00	×1
✓ 40	15/4/1995	26th Two Oceans Marathon	56,00	×1
✓ 41	10/4/1993	24th Two Oceans Marathon	56,00	×1
✓ 42	18/4/1992	23rd Two Oceans Marathon	56,00	×1
✓ 43	14/4/1990	21st Two Oceans Marathon	56,00	×1
✓ 44	25/3/1989	20th Two Oceans Marathon	56,00	×1
✓ 45	15/7/2006	18th Rhodes 52 km Trail Run	52,00	—
✓ 46	9/9/2006	14. Mont-Aux-Sources 50km Challenge	50,00	—
✓ 47	10/9/2005	13. Mont-Aux-Sources 50km Challenge	50,00	—
✓ 48	11/9/2004	12. Mont-Aux-Sources 50km Challenge	50,00	—
✓ 49	13/9/2003	11. Mont-Aux-Sources 50km Challenge	50,00	—
✓ 50	14/9/2002	10. Mont-Aux-Sources 50km Challenge	50,00	—
51	1/9/2001	9. Mont-Aux-Sources 50km Challenge	50,00	—
52	4/9/1999	7. Mont-Aux-Sources 50km Challenge	50,00	—
53	5/9/1998	6. Mont-Aux-Sources 50km Challenge	50,00	—
54	10/4/2016	Modern Athlete Irene Ultra	48,00	—