Thames Ring Series

Thames Ring Series is an ultra-running challenge based in Reading featuring 100-, 150- and 250-mile trail events with set start times from Morrell Rooms and a multi-day completion window for the full loop.

Thames Ring Series takes place from Wednesday 21 April to Sunday 25 April 2027 in Reading, Berkshire. The series features long-distance trail challenges that follow rivers and canals on an anti-clockwise loop through countryside and historic towns, with multiple race distance options and set start times from Morrell Rooms.

Event dates: Wed 21 – Sun 25 Apr 2027
Location: Morrell Rooms, Reading
Prices: £100–£375
Age: 18+

Races and start times

• TR150 (150 miles): Wed 21 Apr 2027 — 10.00am — £150–£200
• TR250 (250 miles): Wed 21 Apr 2027 — 10.00am — £325–£375
• TR100 (100 miles): Fri 23 Apr 2027 — 12.00pm — £100–£150

Highlights

• Ultra-distance circular route following rivers and canals
• Multi-day endurance challenge (full course within 100 hours)
• Checkpoints, dropbag transfers, and food and drink provision (race-dependent)
• 100-mile and 150-mile options alongside the full distance