Thanks for the comments, especially on the Prospector in warm weather – I found quite a few comments on its use in deserts (with no qualification on the season), and I found that surprising considering how hot it can get. I was pretty sure the Prospector and Patagonia Simple Guide Pants would be too warm for summer use when not above treeline.
Anyone have any experience with the current Cloudveil Intertia Peak Pants, which are listed as much heavier than the Prospector? I'm fairly certain they would be too hot for summer use below treeline as well but curious about them for cooler weather and alpine use.
For warm weather, my old Patagonia Jackalopes are better than anything I've seen so far (I say old, because the material this past 2 seasons was lined, heavier and warmer than the material in my light and breathable Jackalope pants). Unfortunately I use those pants for easy to pack, carry and wash travel pants on business and casual trips because they look so respectable and I'm reluctant to use them on the trail. I think the current Patagonia version still doesn't use the material in my pants, though I'll check them out.
I have been using the same Mountain Hardwear convertible Pack Pants for years which are highly breathable, wind resistant and quick drying but : 1) no stretch 2) they have a terrible habit of twisting on my hips after walking for a while so that I have to pull them back to zipper in front middle position. Probably has something to do with the placement of the rise (perhaps it's slightly off center). A poster said he had the same problem with them, but that it went away after a while. 3) they could be lighter 4) couldn't pass for regular pants when walking into town (not necessary, but a plus if I can find a pair like this – love dual use). I also have a pair of old Sportif Convertible Truckee pants which are made of a nylon cordura and are super tough, but not as comfortable as the pack pants.
As I mentioned, the Golite Journey would have been perfect for me except for the awful cut (Golite is pretty uneven that way – some great products with terrific fit and quality which I appreciate and recommend, like my Propel Pants, and others are just off). If anyone knows of any pants like them (light 93% nylon 7% spandex), please let me know.
I used to use light baselayer (capilene) plus shorts/wind pants, but I much prefer hiking pants for the sun and bug protection and breathability + wind resistance. There are many occasions where capilene pants are too warm for me and shorts are not good (for sun and bug protection).
I'm going to check out RailRiders as well.
I'm really surprised there aren't better light warm weather to cool weather stretch softshell pants available.