Sulphur Springs Trail Race

The Sulphur Springs Trail Race is the FIRST Western States Endurance Run Qualifying Race in Ontario. This unbelievable 20K looped course is a hidden gem inside the Dundas Valley Conservation Area of Ancaster, Ontario. We offer 10K, 20K, 50K, 50 Mile, 100K, and 100 Mile race options. Plus a Team 100 Mile Relay.

100K Finishers with a finishing time in under 18 hours, will be granted a ballot in the WSER100 Bib Lottery.

100 Mile Finishers with a finishing time in under 30 hours, will be granted a ballot in the WSER100 Bib Lottery.

With wildlife teeming through this old Carolinian Forest, and waterfalls cascading over rocks along the course, your legs may barely notice traversing the over 460M /1500 ft of elevation per 20K loop. Expect to be challenged on this (mostly) double track trail system as you are supported with FOUR fully stocked Aid Stations along the way.


The Sulphur Springs Trail Race is the Longest Running Ultra Race in the province of Ontario, dating back to 1992. Our race sells out every year, and registration opens October 15, 2024. Don't miss this one!
 

Saturday May 2th, 2025 - 50K, 50 Miles, 100K, 100 Miles + 100 Mile Team Relay

Sunday May 25th, 2025 - 10K, 20K

 

Additional Distances

This event also has the following sub ultra distances

10 KM 20 KM

Results

Date Finishers Top Result (M) Top Result (F)
05/24/25 97 14:38:21 17:22:46
05/25/24 78 16:58:22 17:18:57
05/27/23 45 18:47:31 23:21:37
05/28/22 33 17:25:28 19:52:08
09/26/20 Race Cancelled
05/25/19 15 18:26:10 21:34:40
05/26/18 41 18:49:21 20:52:41
05/27/17 35 20:43:07 24:45:00
05/28/16 27 15:33:34 23:18:32
05/23/15 38 17:50:36 18:27:39
05/24/14 27 18:07:31 17:49:54
05/25/13 57 15:37:24 18:57:59
05/26/12 42 15:40:22 19:53:52
05/28/11 39 17:49:16 20:55:45
05/29/10 36 17:12:37 19:59:38
05/29/10 35 17:12:37 19:59:38
05/23/09 39 18:40:04 21:47:28
05/24/08 32 18:43:43 19:20:35
05/26/07 30 17:14:53 18:57:06
05/27/06 31 18:35:56 19:56:14
05/28/05 24 18:08:25 20:51:25
05/29/04 17 19:10:00 19:40:00
05/24/03 8 19:58:54 21:42:11
05/25/02 13 19:26:25 28:23:53
05/26/01 16 18:47:53 23:36:49
Date Finishers Top Result (M) Top Result (F)
05/24/25 226 8:07:22 9:55:09
05/25/24 179 8:26:02 11:00:17
05/27/23 59 8:50:08 11:43:27
05/28/22 32 11:52:56 13:41:01
09/26/20 Race Cancelled
05/27/17 38 10:46:29 10:29:39
Date Finishers Top Result (M) Top Result (F)
05/24/25 79 7:36:44 9:00:53
05/25/24 53 7:52:33 7:08:00
05/27/23 62 6:28:05 7:56:44
05/28/22 41 7:54:23 8:41:26
09/26/20 Race Cancelled
05/25/19 99 7:19:56 8:56:17
05/26/18 101 6:56:25 8:51:17
05/27/17 70 6:44:13 8:11:00
05/28/16 83 7:15:04 9:15:40
05/23/15 87 6:39:44 7:16:41
05/24/14 83 6:48:31 8:02:18
05/25/13 74 6:07:00 8:01:03
05/26/12 79 6:49:43 7:51:34
05/28/11 47 7:45:07 7:42:34
05/29/10 69 7:14:41 8:14:57
05/29/10 70 6:28:07 8:14:57
05/23/09 42 6:27:32 7:44:21
05/24/08 38 6:31:29 7:55:29
05/26/07 31 6:39:56 8:57:18
05/27/06 29 7:16:09 9:38:21
05/28/05 23 6:26:20 8:06:02
05/25/02 14 8:02:05 8:55:09
Date Finishers Top Result (M) Top Result (F)
05/24/25 316 3:23:02 4:14:06
05/25/24 209 3:33:41 4:48:38
05/27/23 190 3:37:31 4:10:54
05/28/22 152 3:37:46 4:16:00
09/26/20 Race Cancelled
05/25/19 128 3:43:32 4:30:00
05/26/18 160 3:46:19 4:26:41
05/27/17 168 3:33:40 4:28:29
05/28/16 138 3:54:52 4:26:18
05/23/15 105 3:41:45 4:34:42
05/24/14 99 4:10:16 4:40:16
05/25/13 82 3:45:39 4:53:13
05/26/12 80 4:06:53 3:59:45
05/28/11 71 4:10:58 4:53:56
05/29/10 83 3:59:46 4:50:29
05/23/09 53 3:33:13 5:10:27
05/24/08 54 4:10:01 4:03:37
05/26/07 43 3:53:56 4:12:10
05/28/05 57 3:46:26 4:42:58
05/25/02 40 3:57:53 5:11:23
05/27/00 57 3:41:48 4:36:26
05/22/99 45 3:58:38 5:37:42
05/23/98 52 3:53:24 5:05:51
05/24/97 64 3:57:20 4:40:08
05/25/96 49 3:52:50 4:29:36
Date Finishers Top Result (M) Top Result (F)
05/27/17 14 2d 03:00:20 2d 21:51:20

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