The Slim Gauge Circle is an informal group of around 150 United Kingdom, plus some overseas modellers interested in North American narrow gauge railroads. The Circle was founded in 1982 to provide a meeting place where the emphasis was on modelling,  the exchange of ideas, meeting old and making new friends, plus some trading.  Members interests include 3ft Colorado narrow gauge railroads, Maine 2ft East Coast narrow gauge railroads, plus logging and mining shortlines in various scales and gauges.

We hold national meetings twice a year at the L.M.Railway Association Club, Hillmorton, near Rugby, in May and October nominally from 10:00 to 16:00. There are also local area meetings in various parts of the country – see our Meetings page for more information. The Slim Gauge Circular magazine is published twice a year with Newsletters in between.

There are currently two special interest Modular Layout Groups which meet several times a year, an On30 group (SGCOTT)  and  a HOn3 group (SGC – Hostlars),  which are only open to members of the Slim Gauge Circle.

The Circle has a Yahoo group at . There is a new forum hosted by Groups IO at: .