Knut Kronstad

Born : 1953 Cat. M70 Ultrarunner since 2008

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 ?

France

United Kingdom

Norway

Sweden

76,9%

Rank quotient ?This runner's calculation uses 85 eligible race(s): Σ(rank − 1) = 5 804; Σ finishers = 7 548. 5 804 / 7 548 × 100 = 76.89%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed91

Km — ultra races7 022 km

> 100 km16

> 160 km5

> 200 km1

> 24h12

> 48h1

Longest race233,4 km

18th 145mi Grand Union Canal Race — 2/6/2012

Km per year (ultra races)

2022

249

2023

335

2024

147

2025

210

2026

Race types (share of distance)

Road29,3%

Trail30,9%

Stage8,2%

Elim.11,2%

?20,4%

Records

50 km5h20'54 100 km10h46'25 50 mi6h44'15 100 mi27h23'28 6 h60,64 km 12 h100,17 km 24 h186,82 km Backyard9 loops

HISTORY

85 race(s) · 9 split(s) nested

Date		Race	Perf.	Rk
2026
29.08	Backyard Ultra	Backyard Ås	60.354 km (9h)	124
22.08	50km	EcoTrail Trondheim, 50km	8:10:30 h	80
27.06	50km	11th Romeriksåsen på langs	9:00:39 h	230
30.05	50km	11th EcoTrail of Oslo 50 km	6:56:22 h	388
2025
24.08	6h	Eidsvoll Verk 6-timers	45.137 km	64
28.06	50km	10th Romeriksåsen på langs	10:24:06 h	314
26.04	52km	Dagens Dobbel	6:09:30 h	11
2024
20.10	50km	Jar høstultra 50 km	7:59:58 h	24
06.07	24h	Skövde Ultrafestival 24h	137.451 km	7
06.07	12h	Skövde Ultrafestival 24h - 12h split	81.341 km	10
29.06	50km	9th Romeriksåsen på langs	8:47:43 h	273
25.05	6h	Lierskogen 6-timers	51.815 km	9
21.04	46km	16th Täby Extreme Challenge (TEC) - MiniUltra 46K	7:09:43 h	12
2023
25.11	24h	16th Bislett 24 Hour Indoor Challenge	151.783 km	52
25.11	12h	16th Bislett 24h hour indoor challenge - 12h Split	81.975 km	101
25.11	100km	16th Bislett 24h hour indoor challenge - 100km Split	15:05:29 h	92
27.08	6h	Eidsvoll Verk 6-timers	47.379 km	40
24.06	50km	8th Romeriksåsen på langs	11:00:00 h	221
2022
22.10	Backyard Ultra	Backyard Sandefjord	53.600 km	92
2021
20.11	24h	Bislett 24-Hour Indoor Challenge	117.322 km	106
20.11	12h	Bislett 24-Hour Indoor Challenge - 12h Split	71.526 km	136
2019
24.08	6h	Ringerike 6-timers	49.426 km	53
20.07	81km/2stages	17th Rallarvegsløpet 54+27km	12:10:18 h	25
2018
25.08	6h	Ringerike 6-timers	48.400 km	41
21.07	81km/2stages	16th Rallarvegsløpet 54+27km	12:43:02 h	43
26.05	80km	4th EcoTrail of Oslo 80 km	14:21:09 h	205
2017
27.10	Backyard Ultra	Backyard Ultra Sandefjord	46.942 km	117
26.08	6h	Ringerike 6-timers	50.585 km	26
20.05	80km	3rd EcoTrail of Oslo 80 km	14:28:57 h	248
2016
08.09	72h	No Finish Line 72h Oslo	56.800 km	44
2015
31.12	50km	2nd Romerike 50 km ChampagneUltra	7:15:45 h	35
07.11	80km	Halden Ultraintervall 8x10km	9:08:20 h	18
05.09	60km	1st Nordmarkstravern (DobbelTravern)	9:02:35 h	31
08.08	100km	Stockholm 100 km Ultramarathon - open race	14:57:54 h	106
13.06	61km	UltraBirken 61 km løp	9:33:33 h	199
23.05	80km	1st EcoTrail of Oslo 80 km	11:01:14 h	192
02.05	100km	Kristiansand 100 km - Norsk Mesterskap	12:13:02 h	16
02.05	50km	Kristiansand 100 km - Norsk Mesterskap - 50km Split	5:40:40 h	16
11.04	80km	Røyse Ultra	7:22:08 h	15
2014
22.11	24h	Bislett 24 hour indoor challenge	150.763 km	62
01.11	80km	Halden Ultraintervall 8x10km	8:41:22 h	31
06.09	82km	2. Telemarks Tøffaste	16:53:53 h	45
09.08	100km	Stockholm 100 km Ultramarathon	14:53:32 h	105
14.06	61km	UltraBirken 61 km løp	10:03:40 h	172
26.04	53mi	9th Highland Fling Race 53 Mile	13:27:42 h	462
2013
30.11	24h	Bislett 24 hour indoor challenge - Norsk Mesterskap	153.243 km	27
30.11	24h	Bislett 24 hour indoor challenge - open race	153.243 km	53
02.11	80km	Halden Ultraintervall 8x10km	10:17:43 h	29
04.08	100km	Stockholm 100 km Ultramarathon	13:23:08 h	158
08.06	59km	UltraBirken 59 km løp	8:42:08 h	94
04.05	6h	9th Romerike 6-Timers Løb	53.344 km	42
06.04	100km	Bergen Ultra 100 km	14:13:53 h	14
2012
30.11	24h	3ème 24h de Marignane	133.000 km	11
03.11	80km	Halden Ultraintervall 8x10km	7:52:28 h	9
15.09	57.5km	UltraBirken 57 km løp	8:49:42 h	75
01.09	6h	8th Romerike 6-Timers Løb	50.277 km	43
02.06	145mi	18th 145mi Grand Union Canal Race	44:26:00 h	52
14.04	100mi	4th Täby Extreme Challenge 100 miles	29:26:25 h	24
2011
26.11	24h	Bislett 24 hour indoor challenge	164.392 km	29
20.08	6h	7th Romerike 6-Timers Løb	58.779 km	54
30.04	6h	Ringerike Ultrafestival 6-timers	51.895 km	35
09.04	100mi	3rd Täby Extreme Challenge 100 miles	27:23:28 h	37
26.02	100km	Bislett 100 km indoor challenge	11:58:31 h	28
26.02	12h	Bislett 12 hour indoor challenge	100.170 km	26
26.02	6h	Bislett 12 hour indoor challenge - 6h Split	55.228 km	27
2010
27.11	24h	Bislett 24 hour indoor challenge	156.429 km	43
27.11	12h	Bislett 24 hour indoor challenge - 12h Split	95.920 km	59
14.11	6h	1. Undheim 6-timers	57.116 km	16
18.09	73km	UltraBirken 73 km løp	11:10:02 h	68
21.08	6h	6th Romerike 6-Timers Løb	52.650 km	46
24.07	81km/2stages	8th Rallarvegsløpet 54+27km	9:42:13 h	46
10.07	75km	Hornindal Rundt	22:55:21 h	14
01.07	127.5km/2stages	St Olav Ultra	16:00:36 h	10
27.06	50.6km	III. Kick-Master Ultra 50 km	5:20:54 h	7
19.06	50mi	3. Kristins Runde - Oslo 50 Miles Trail Run	11:27:18 h	36
12.06	72km	Malm Ultraintervall	8:33:07 h	11
23.05	51.5km	Ulvådalen Ultra	5:27:18 h	10
17.04	6h	Eggemoen 6-timers Ultra Challenge	55.845 km	29
10.04	100km	Bergen Ultra 100 km	10:46:25 h	15
10.04	50km	Bergen Ultra 100 km - 50km Split	4:46:39 h	14
2009
07.11	80km	Halden Ultraintervall 8x10km	8:48:18 h	20
03.10	50.6km	II. Kick-Master Ultra 50 km	5:31:52 h	19
19.09	70km	UltraBirken 70 km løp	10:58:25 h	41
22.08	6h	5th Eidsvoll 6-Timers Løb	60.643 km	47
09.07	127.5km/2stages	St Olav Ultra	14:36:15 h	13
27.06	50mi	2. Kristins Runde - Oslo 50 Miles Trail Run	13:14:35 h	23
06.06	72km	Malm Ultraintervall	9:05:38 h	14
18.04	6h	Eggemoen 6-timers Ultra Challenge	52.940 km	57
2008
06.12	24h	Bislett 24 hour indoor challenge	186.815 km	9
06.12	12h	Bislett 24 hour indoor challenge - 12h Split	108.455 km	14
01.11	80km	Halden Ultraintervall 8x10km	6:44:15 h	7
23.08	6h	4th Eidsvoll 6-Timers Løb	59.175 km	50
26.07	81km/2stages	6th Rallarvegsløpet 54+27km	11:49:52 h	40
28.06	50mi	1. Kristins Runde - Oslo 50 Miles Trail Run	11:28:26 h	20

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	2/6/2012	18th 145mi Grand Union Canal Race	233,35	×3
✓ 2	6/12/2008	Bislett 24 hour indoor challenge	186,82	×3
✓ 3	26/11/2011	Bislett 24 hour indoor challenge	164,39	×2
✓ 4	14/4/2012	4th Täby Extreme Challenge 100 miles	160,93	×2
✓ 5	9/4/2011	3rd Täby Extreme Challenge 100 miles	160,93	×2
✓ 6	27/11/2010	Bislett 24 hour indoor challenge	156,43	×2
✓ 7	30/11/2013	Bislett 24 hour indoor challenge - Norsk Mesterskap	153,24	×2
✓ 8	25/11/2023	16th Bislett 24 Hour Indoor Challenge	151,78	×2
✓ 9	22/11/2014	Bislett 24 hour indoor challenge	150,76	×2
✓ 10	6/7/2024	Skövde Ultrafestival 24h	137,45	×2
✓ 11	30/11/2012	3ème 24h de Marignane	133,00	×2
✓ 12	1/7/2010	St Olav Ultra	127,50	×2
✓ 13	9/7/2009	St Olav Ultra	127,50	×2
✓ 14	20/11/2021	Bislett 24-Hour Indoor Challenge	117,32	×1
✓ 15	26/2/2011	Bislett 12 hour indoor challenge	100,17	×1
✓ 16	8/8/2015	Stockholm 100 km Ultramarathon - open race	100,00	×1
✓ 17	2/5/2015	Kristiansand 100 km - Norsk Mesterskap	100,00	×1
✓ 18	9/8/2014	Stockholm 100 km Ultramarathon	100,00	×1
✓ 19	4/8/2013	Stockholm 100 km Ultramarathon	100,00	×1
✓ 20	6/4/2013	Bergen Ultra 100 km	100,00	×1
✓ 21	10/4/2010	Bergen Ultra 100 km	100,00	×1
✓ 22	26/4/2014	9th Highland Fling Race 53 Mile	85,30	×1
✓ 23	6/9/2014	2. Telemarks Tøffaste	82,00	×1
✓ 24	20/7/2019	17th Rallarvegsløpet 54+27km	81,00	×1
✓ 25	21/7/2018	16th Rallarvegsløpet 54+27km	81,00	×1
✓ 26	24/7/2010	8th Rallarvegsløpet 54+27km	81,00	×1
✓ 27	26/7/2008	6th Rallarvegsløpet 54+27km	81,00	×1
✓ 28	19/6/2010	3. Kristins Runde - Oslo 50 Miles Trail Run	80,47	×1
✓ 29	27/6/2009	2. Kristins Runde - Oslo 50 Miles Trail Run	80,47	×1
✓ 30	28/6/2008	1. Kristins Runde - Oslo 50 Miles Trail Run	80,47	×1
✓ 31	26/5/2018	4th EcoTrail of Oslo 80 km	80,00	×1
✓ 32	20/5/2017	3rd EcoTrail of Oslo 80 km	80,00	×1
✓ 33	7/11/2015	Halden Ultraintervall 8x10km	80,00	×1
✓ 34	23/5/2015	1st EcoTrail of Oslo 80 km	80,00	×1
✓ 35	11/4/2015	Røyse Ultra	80,00	×1
✓ 36	1/11/2014	Halden Ultraintervall 8x10km	80,00	×1
✓ 37	2/11/2013	Halden Ultraintervall 8x10km	80,00	×1
✓ 38	3/11/2012	Halden Ultraintervall 8x10km	80,00	×1
✓ 39	7/11/2009	Halden Ultraintervall 8x10km	80,00	×1
✓ 40	1/11/2008	Halden Ultraintervall 8x10km	80,00	×1
✓ 41	10/7/2010	Hornindal Rundt	75,00	×1
✓ 42	18/9/2010	UltraBirken 73 km løp	73,00	×1
✓ 43	12/6/2010	Malm Ultraintervall	72,00	×1
✓ 44	6/6/2009	Malm Ultraintervall	72,00	×1
✓ 45	19/9/2009	UltraBirken 70 km løp	70,00	×1
✓ 46	13/6/2015	UltraBirken 61 km løp	61,00	×1
✓ 47	14/6/2014	UltraBirken 61 km løp	61,00	×1
✓ 48	22/8/2009	5th Eidsvoll 6-Timers Løb	60,64	—
✓ 49	29/8/2026	Backyard Ås	60,35	—
✓ 50	5/9/2015	1st Nordmarkstravern (DobbelTravern)	60,00	—
✓ 51	23/8/2008	4th Eidsvoll 6-Timers Løb	59,18	—
✓ 52	8/6/2013	UltraBirken 59 km løp	59,00	—
✓ 53	20/8/2011	7th Romerike 6-Timers Løb	58,78	—
✓ 54	15/9/2012	UltraBirken 57 km løp	57,50	—
✓ 55	14/11/2010	1. Undheim 6-timers	57,12	—
✓ 56	8/9/2016	No Finish Line 72h Oslo	56,80	—
57	17/4/2010	Eggemoen 6-timers Ultra Challenge	55,85	—
58	22/10/2022	Backyard Sandefjord	53,60	—
59	4/5/2013	9th Romerike 6-Timers Løb	53,34	—
60	18/4/2009	Eggemoen 6-timers Ultra Challenge	52,94	—
61	21/8/2010	6th Romerike 6-Timers Løb	52,65	—
62	26/4/2025	Dagens Dobbel	52,00	—
63	30/4/2011	Ringerike Ultrafestival 6-timers	51,90	—
64	25/5/2024	Lierskogen 6-timers	51,82	—
65	23/5/2010	Ulvådalen Ultra	51,50	—
66	27/6/2010	III. Kick-Master Ultra 50 km	50,60	—
67	3/10/2009	II. Kick-Master Ultra 50 km	50,60	—
68	26/8/2017	Ringerike 6-timers	50,59	—
69	1/9/2012	8th Romerike 6-Timers Løb	50,28	—
70	22/8/2026	EcoTrail Trondheim, 50km	50,00	—
71	27/6/2026	11th Romeriksåsen på langs	50,00	—
72	30/5/2026	11th EcoTrail of Oslo 50 km	50,00	—
73	28/6/2025	10th Romeriksåsen på langs	50,00	—
74	20/10/2024	Jar høstultra 50 km	50,00	—
75	29/6/2024	9th Romeriksåsen på langs	50,00	—
76	24/6/2023	8th Romeriksåsen på langs	50,00	—
77	31/12/2015	2nd Romerike 50 km ChampagneUltra	50,00	—
78	24/8/2019	Ringerike 6-timers	49,43	—
79	25/8/2018	Ringerike 6-timers	48,40	—
80	27/8/2023	Eidsvoll Verk 6-timers	47,38	—
81	27/10/2017	Backyard Ultra Sandefjord	46,94	—
82	21/4/2024	16th Täby Extreme Challenge (TEC) - MiniUltra 46K	46,00	—
83	24/8/2025	Eidsvoll Verk 6-timers	45,14	—