Can I rake the routes for a specific resource?

You can check for routes of specific controller:
rake routes CONTROLLER=account_groups

As seen in @ZiiCEagle's answer this is deprecated now and you should use
rails routes -c account_groups

I usually do rake routes | grep ressource_name.

Also check out Rails HtmlRoutes if you want it nice and pretty in HTML.

rake routes CONTROLLER=controller_name

has been deprecated in rails 5.1.Now it's

 rails routes -c controller_name

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