SiEntries Options
Login / Register

SilverBackTrails Oswiu’s Revenge - Half Marathon

Event Facebook Page
Event Instagram Page
Event Website

Sunday 17th May 2026

Entries Open
Thursday 29th May 2025 at 00:01
Entries Close
Saturday 16th May 2026
Event Min. Age
18 or older
Age Limits
Relative to Event Date (17/05/2026)
Entries So Far
1 Participant
Entry Fees
Entry Fee   £20.00   
Contact
Event Organiser - Adrian Martin

To enter you must first Log In or Register your Details with SiEntries.

Oswiu's Revenge is  a low key friendly trail running event of circa 13.2 miles  around the Black Hambleton and Silton Woods area south of Osmotherley.

The course has a varied terrain with extensive views however it will challenge you and possibly take you beyond your comfort zone.

As with all the Revenge Half Marathons a "sting in the trail awaits"...

The route will take you along forest tracks and ancient trods with views of the North Yorkshire Moors and the Vale of York...

Legend has it that Oswiu or Oswy son of King Oswald drowned near Roseberry Topping, his grief-stricken mother died soon after some miles to the south in a place that came to be known as;

'Os-by-his-mother-lay'

Now the village of Osmotherly.

"Oswiu will get his revenge"...

Each finisher will receive a bespoke medal specially commissioned to celebrate their achievement and a certificate.

There will be a time limit of 3.5 hours.

All competitors are to carry as a minimum 

  • Waterproof Jacket with taped seams unless Paramo.
  • Hat and gloves
  • Spare thermal top or jacket for emergency only.
  • Emergency bivvy bag.
  • 500 mils of fluid
  • At least 60 grams of food (about a handful of jelly babies etc)
  • Fully Charged Mobile phone.
  • You should have What3words and OS Locate or OS Maps loaded onto your mobile device.
  • Working compass. (no bubbles and settles pointing towards magnetic north when you hold it flat in the palm of your hand)
  • OL 26 OS Map or Harvey’s Map of the North Yorkshire Moors.

This is the minimum that should be carried, May can still be challenging weather-wise.....

There will be some flags and marshals to aid navigation.  The route will be marked on a master map at registration. A gpx of the route will be sent to participants before the event. 

There will be water, coke and Haribo-type sweets and snacks at one checkpoint on the course and at the end. There will be provisions suitable for vegetarians and vegans.

The event start will be from Square Corner just outside of Osmotherley

Entry is limited to 50 participants

There is ample parking at the start/ finish. A charge of £1 per car will be collected on the day and donated to the National Park.

All participants must be at least 18 years of age.

All entries will be via SiEntries with strictly no entries on the day.

Oswiu will exact his revenge from 10 am on Sunday the 17th of May 2026, with registration for number collection and marking of maps from 09:15 am.

Canine running partners are welcome as long as they are kept on a short lead or harness as there is likely to be sheep grazing in the area. To aid with safety dog powered owners will start five minutes after the rest of the field, your 3.5 hours time limit will be adjusted accordingly. There are a number of technical ascents and descents throughout the route.

The North York Moors and surrounding area are bursting with life at this time of year, with tree blossom and wild Rhododendrons coming into bloom on parts of the route, along with spring lambs, nesting birds, and if you are lucky a glimpse of fawns trotting between the trees...

Event organised by SilverBack Trails 
Contact Adrian Martin at silverbacktrails@gmail.com 

View the Event Disclaimer / Terms and Conditions.

View the Event Cancellation / Refund Policy.

Other events by SilverBackTrails

Sat 14 Jun 25 Lamplighter 30 Something Night Ultra...
Sat 5 Jul 25 Summits of The North York Moors Ultra
Sun 17 Aug 25 SilverBackTrails Othnesbery’s Revenge
Sun 22 Feb 26 SilverBackTrails Lilla’s Revenge
Sat 18 Apr 26 SilverBackTrails Goathland V Trig Ultra

Save the date and share

Event Location
Square Corner, nr Osmotherley