I believe the camel:route-start shell command should help here
Start a Camel route or a group of routes
camel:route-start [options] route [context]
The Camel route ID or a wildcard expression
The Camel context name.
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You cannot do this from the karaf shell.
But the web console with hawtio allows you to do that. http://hawt.io/ You can send messages to Camel endpoints. Though forcing a route to trigger from a quartz endpoint is harder as its really only quartz which can do this. If we open up for being able to send a message to any Camel route, then that could also be a little security risk. Though as you say for some kind of DEVELOPER mode it may be desirable to do so easily.