I have a Wahoo bolt and one of the fields is % grade. Little bit of lag but I find this useful IF I can remember to look down during the ride. Usually my head is all about getting up the mountain. After the ride, in post-race analysis, I'd like to see what that monster grade was. Sorry, the Wahoo app allows it as a field but does not report the data in post-ride analysis. They did suggest that I could get it by linking to Strava and/or TrainingPeaks. I share my data with both apps and I see no way to see the maximum grade ridden based on the data from the Bolt. Yes, I suppose I could download the route and then evaluate it that way....time consuming to hunt around for the peak of interest. Especially since the data was recorded in the Bolt.

Does anyone know of other bike computers whose post-ride analysis will show the maximum grade climbed? Again, I realize that I could download the route and analyze this route, but it's a manual effort that is rather tedious. My thought is since the Wahoo bolt is not saving this information there's no way a third party app will be able to report on it if the info is not saved in the Bolt. Does Garmin show the %grade in post ride analysis?

Thanks in advance for any tips on how to evaluate this data.

If you upload your data to a website or program on your computer, then it should show the percent grade as determined by your device. Different sites do it slightly different, but RidewithGPS.com shows you the max grade for your ride and where it's at. It also lets you select a portion and see the average and max grade for that too. If you don't have elevation data, then it uses the map data they have. However both map data and your devices data are prone to errors and should not be considered absolute. But overs several rides on the same route you can start to see when you can and can't trust the data.

Strava, Garmin Connect and others do this same stuff...RWGPS is just what I tend to use more often if I upload. For most daily rides I still just use the old Garmin Training Center software to show me the basics that I'm interested in.

RidewithGPS also has a feature called VAM (Vertical Ascent in Meter/hour). It basically calculates how quickly you're moving vertically.

Topographic map (downloads), there you have isobars with elevation change indicated..