Search for a Challenge Event on the national website.
You may be able to enter a number of LDWA events online using SiEntries or Fabian4. 
When available, it usually costs more to enter On The Day (OTD) than in advance.
You may be able to follow the progress of some events using PACER, the online LDWA Results service.
Details of qualifying events for the The Jurassic 100 in 2027 are here.

2026
Herts Hobble 21 June (26/18 miles) SiEntries until 13 June (an Essex & Herts Triple Challenge Event)
Rodent Wriggle 11 July (31/23/13.5 miles) SiEntries until 3 July (no OTD)
Sussex Stride 2026 22/23 August (52 miles) SiEntries until 9 August (no OTD) (a KSS Triple Challenge Event)
Flower of Suffolk Marathon 4 October (26/18 miles)
Marlow Donkey 4 October (50/40/25 km) SiEntries until 20 September (no OTD)
Essex Walker 25 October (26/18 miles) SiEntries from 1 July (no OTD) (an Essex & Herts Triple Challenge Event)
42nd Gatliff Marathon 17 October (50/25 km) SiEntries until 15 October (or OTD)

2027
52nd Surrey Inns Kanter 1 January (20/12 miles)
25th Stansted Stagger 3 January (26 miles) SiEntries from 31 August
48th Winter Tanners 17 January (30/20 miles) Fabian4 from 1 November
The Surrey Loops 14 February (30/20/10 miles) 
Surrey Tops 18/19 September (50 miles)  (a KSS Triple Challenge Event)

Previous Events

You can see detailed results of several events using PACER, the online LDWA Results service.

2026
10th Pick & Mix 31 May (10/8/6/5 miles) Results and Report (a BBN Triple Challenge Event)
South Downs Marathon 2026 26 April (28/18 miles) PACER
Capital Challenge 28 March (26 miles) PACER
The Winter Poppyline 2026 14/15 February (50 miles) PACER
55th Punchbowl Marathon 8 February (30/20 miles) PACER
47th Winter Tanners 18 January (30/20 miles) PACER
Stansted Stagger 4 January (26 miles) PACER
51st Surrey Inns Kanter 1 January (20/12 miles) Results

2025
5th Sundon Saunter 16 November (27/18/12 miles) Times and Report (an S-S-S Triple Challenge Event)
25th Blackwater Marathon 25 October (26.7/18 miles) PACER (an Essex & Herts Triple Challenge Event)
41st Gatliff Marathon 18 October (50/25 km) Results and Report
The Marlow Donkey 2025 12 October (25/16 miles) Results
Sussex Loops 2025 3 August (31/25/18/12 miles) PACER
Golden 50 26-27 July (50 miles) PACER
Herts Hobble 15 June (26/18 miles) PACER (an Essex & Herts Triple Challenge Event)
9th Pick & Mix 1 June (10/8/6/5 miles) Results and Report
South Downs Marathon 2025 11 May (28/18 miles) PACER
9th Capital Challenge 12 April (27 miles) PACER
23rd Chiltern Kanter 2 March (26/18/13 miles) Results (a BBN Triple Challenge Event)
54th Punchbowl Marathon 9 February (30/20 miles) PACER
46th Winter Tanners 19 January (30/20 miles) PACER
Stansted Stagger 5 January (26 miles) PACER
50th Surrey Inns Kanter 1 January (20/12 miles) Results

2024
Shillington Shuffle 17 November (26/18/12 miles) Times and Report (an S-S-S Triple Challenge Event)
40th Gatliff Marathon 19 October (31.5/15 miles) Results and Report
Potter Around The Otter 50 12-13 October (50 miles) Results
Flower of Suffolk Marathon 6 October (26/18 miles) Results
The Marlow Donkey 29 September (25/16 miles) Results
Surrey Tops 21-22 September (50 miles) PACER (a KSS Triple Challenge Event)
The Sussex Loops 4 August (31/22/12 miles) ResultsPACER
Rodent Wriggle 27 July (31.5/23/13.5 miles)  Results
Herts Hobble 23 June (26.2/18 miles) PACER (an Essex & Herts Triple Challenge Event)
Pick and Mix 6 June (10+/or8+/or6+/or4.5 miles) Results and Report (a BBN Triple Challenge Event)
The South Downs Marathon 28 April (28 miles) PACER
Essex Walker 14 April (27/17 miles) PACER (an Essex & Herts Triple Challenge Event)
The 8th Capital Challenge 6 April (28 miles) PACER
53rd Punchbowl Marathon 11 February (30/20 miles) PACER
45th Winter Tanners 21 January (30/20 miles) PACER
Stansted Stagger 7 January (26 miles) PACER
49th Surrey Inns Kanter 1 January (20/12 miles) Results