How can I view deals that have been in a stage too long?

This article shows how to view deals with time in stage in red.

Navigate to the "Forecast Management Dashboard" in HubSpot. Scroll down until you find the report "Time in Stage - Deals in Red".

Locate your name and select the number in the "Count of Deals" column. This will give you a list of deals that have been in a stage longer than the typical sales cycle for this stage.