Riding the TT course — the rules, the one-way Mountain and what's left of Mad Sunday

Every biker who comes to the island wants to ride the course. You can: it’s public road, and outside the closures it belongs to anyone with a bike and a licence. This page covers what the rules are the rest of the year, how they change during the TT, what’s become of Mad Sunday, and how not to be the reason the police campaign exists. For the road layout, see the course map. For the island’s driving rules in general, see driving on the Isle of Man.

Riding it the rest of the year

The course is ordinary A-road for most of the year, open both ways. There’s one exception: Governor’s Dip, the last corner before the finish. Since 2008 normal traffic has used a new link road from Signpost Corner to Governor’s Bridge, and the old road and the dip are only used for racing.

A lap is 37.73 miles. At a steady road pace, with the villages and Douglas traffic, that’s under an hour. What you’ll find:

• Towns and villages. Douglas, Union Mills, Glen Vine, Crosby, Kirk Michael, Ballaugh, Sulby and Ramsey all have speed limits, 30mph unless signed otherwise. They’re enforced. Racers go through Kirk Michael flat out. You don’t.
• Open country. Some of the roads between the villages have signed limits, and some have none. Read the signs, not the reputation.
• The Mountain Road. From Ramsey to Creg-ny-Baa, the A18 mostly has no numerical speed limit. It’s also open moorland with sheep that wander onto the road, cattle grids, crosswinds, and cloud that can come down to a few car lengths. There’s a level crossing with the Snaefell Mountain Railway at the Bungalow. In winter the road sometimes closes for snow and ice.

No speed limit doesn’t mean no law. Careless and dangerous riding are offences at any speed, and the Isle of Man Highway Code (opens in a new tab) is clear that a limit is a maximum, not a target.

During the TT: the one-way Mountain

For the whole TT fortnight, the A18 from Ramsey Hairpin to Creg-ny-Baa is one-way in the racing direction. In 2026 that ran from 4.30pm on Friday 22 May to 9.30am on Tuesday 9 June, and cycling on that section was banned (2026 road closure notice (opens in a new tab)). The 2027 dates weren’t published when we checked (September 2026), but expect the same pattern.

What it means in practice:

• You can only ride the Mountain from Ramsey towards Douglas. To get back to Ramsey, take the A2 coast road through Laxey.
• The rest of the course stays two-way when it’s open.
• Temporary speed limits go up on stretches of the course during the TT, and they’re enforced. They change from year to year and they’re signed. In 2024, for example, the Mountain had 50mph from Ramsey Hairpin to the Gooseneck, 60mph from Keppel Gate to Creg-ny-Baa, 40mph from the Creg-ny-Baa back road to Lanjaghan Lane, and 60mph from there to Hillberry (3FM (opens in a new tab)).
• Whenever the course is closed for a session, you can’t ride it at all. The Mountain closes earlier than the rest and can reopen later. See TT road closures for the times.

The August Manx Grand Prix and Classic TT fortnight works differently. In 2026 the Mountain Road stayed two-way, though cycling on it was banned.

What happened to Mad Sunday

Mad Sunday used to be the middle Sunday of TT fortnight. There was no racing, the Mountain was one-way, and it seemed that everyone who’d brought a bike went up it at once. In recent years that Sunday has become a race day. The Superbike TT ran on it in 2026, and Supersport Race 1 is scheduled for Sunday 6 June 2027 (TT schedule). In 2026 the Sunday closure window was 12.30pm to 6.30pm, so the Mountain was open and one-way before and after.

The crowds haven’t gone away. They’ve just spread out. The one-way Mountain is busy whenever it’s open during TT fortnight, especially in the evening after a session and at the weekends. Expect riders of every ability on the same road, and a lot of them on the island for the first time.

The police, and the numbers

The Isle of Man Constabulary runs a road safety campaign every TT. In 2026 it was called “How Will Your TT End? You Choose…”. The police use marked and unmarked vehicles all over the island. By their own figures, TT 2025 saw 32 road collisions with injuries and 65 with damage only. There were also 226 speeding offences, 44 for careless driving, 9 for drink-driving and 22 positive drug tests. The police have also said that men over 50 are the group most often seriously hurt (Motorcycles.News (opens in a new tab), reporting the police’s figures). During TT 2026 the police said they had already handed out more speeding fines than in the whole of 2025, including to a rider at 118mph in a 50mph zone (ITV News (opens in a new tab)).

The fine is the least of it. The top of the Mountain is a long way from Noble’s Hospital.

Lapping etiquette

None of this is law. It’s what stops you annoying the locals, or ending up in a hedge.

• Keep left, always. On the two-way sections there’s oncoming traffic on every blind bend, including buses, tractors and islanders going to work.
• Pull over for faster traffic. Let people by where it’s safe. Don’t race someone who’s come past you.
• Don’t stop on a bend. If you want a photo at the Gooseneck or the Verandah, pull right off the road where there’s space to park.
• Mind the tram. At the Bungalow the Snaefell Mountain Railway crosses the road on the level. Stop when the lights say so.
• Respect the “Roads Open” car. When a session ends, the course reopens behind the official car. Don’t overtake it. It’s an offence, and it isn’t a pace car.
• Leave the kerbs and the verges alone. Marshals’ posts, straw bales and signs are set up for the racing. Don’t move them, park in them or ride over them.

There’s no official way for visitors to ride a lap on closed roads. Closed-course laps are for competitors, officials and invited parades. Your lap is on open roads, with everyone else.