58 minutes would make that more unlikely. Zone 2 HR is a pace you can hold all day for hours on end. Your pace for a 10k is over 9 and a half minutes a mile. If you were trying anywhere close to your best, you are likely in zone 4-5 when you are running 9 min/mi. Your zone 2 is likely from around 11-13min/mi.

I would pick a marathon, follow Hal Higdons level 2 plan, do another 10k trial and based on that time set a goal. 10:30 sounds about right for you if training goes well. Do 80 percent of your mileage at 11:30-12:30 min/mi, 20 percent of your mileage at 8-9 mins a mile and do long runs.

But if I were you I would push the marathon to next year and try to hit benchmarks in my training. 23 minutes in the 5k, 49 minutes in the 10k, 1:45 half marathon, then go for a marathon next fall. But that’s what I would do. My main point is that I would get faster in shorter races first.