The road left the A81 at what is now a mini-roundabout south of Callander Bridge. It headed west through trees above the Eas Gobhain river, passing a holiday park, forestry car park and other touristy sites. After about a mile the road turns sharply to the right to cross Gartchonzie Bridge over the river, with a minor road continuing ahead to Invertrossachs. The A892 ended soon afterwards on the A821.
Originally classified as the B828, the road was upgraded to Class I status as the A892 in the late 1920s. The road is still shown on the 1976 OS Landranger sheet, but had been declassified by 1981. The road is largely single track with a signposted weak bridge over the Eas Gobhain, which probably explains why the road is now unclassified.