Over the last 13 campaigns, these Lancashire rivals have never been out of the same league. When Blackburn were automatically promoted from the Championship in 2001, Bolton accompanied them via the play-offs and when one was relegated last season, the other soon followed.
The pattern is likely to continue for at least another year, unless Bolton, whose problems - unlike Rovers' - appear more to do with a gradual corrosion of confidence rather than absolute absence of collective ability, can regularly recreate the type of performance that secured the points.
The decision makers at both clubs decided that a change of manager was the trick to revive fortunes but there has been no remarkable turnaround so far.
Henning Berg and Dougie Freedman had won only one each in their five respective matches in charge, with Rovers boss Berg yet to savour a home victory.
Freedman was unbeaten with four draws and an injury-time equaliser at the weekend against Brighton seemed to inject some belief into his team in the early stages of this fixture with captain Kevin Davies flashing home the opener after two minutes.
Paul Robinson in the home goal was overworked throughout the first half which culminated with the hosts being booed off the pitch.
Chung-Yong Lee extended Bolton's lead on the hour when he reacted first to a free-kick that had been parried on to the right post by Robinson.
The atmosphere was de-pressingly familiar as fans mockingly cheered Danny Murphy's scooped shot. Black-burn were abject and Jordan Rhodes' late consolation, a mere statistic.
Blackburn (4-4-1-1) Robinson; Henley, Dann, G Hanley, Martin Olsson; Formica, Murphy, Etuhu (Lowe 61), King (Kazim-Richards 70); Rochina (Pedersen 68); Rhodes. Subs Kean, Givet, Markus Olsson, Vukcevic. Booked Rochina.
Bolton (4-2-3-1) Bogdan; Mears, Knight, Ricketts, Warnock; Andrews, Spearing; Lee (Mills 88), Butterfield (Petrov 72), Eagles (Pratley 80); K Davies. Subs Lonergan, Ream, Ngog, Afobe. Booked Spearing, Warnock.
Referee Stuart Attwell (Nuneaton)