Hi Jim. I think that the beefiest "maximally real" 12-point steel crampons do need (or at least recommend using with?) a boot with a good shank. But you can at least get darned close in trail runners. I have a pair of 10-point Stubai aluminum crampons that work great with trail runners and really are a crampon, not just the more vague "traction device". I climbed Mt. Adams in these, second highest mountain in WA state (though I'm pretty sure I wore boots then; not sure which I'd choose today for that particular mountain ...).

I've also used the 6-point sort of mini-crampons that ULA used to sell (discontinued), and certainly various other mini-crampons will likely work fine.

I don't have pictures I can think of off-hand of me; a hasty web search turned up this picture, maybe there are others (I didn't look hard).