Fruitnut - I’m not the best or only to speak to this, so I hope others will chime in… but will provide my experience with the soil conditions. My experience with peach production is limited, but I do know that nectarines are more of a challenge here than peaches, though some do have them. To your point to me in earlier posts, I would think you would want a pretty good sized greenhouse here to do what you do… hail is a threat late April through late June; cold snaps a risk April through mid-May. Last frost is often considered Mother’s day, though not always spot on, and warmer vegetables practically go in the ground (unprotected) later.
On soils… I live maybe 12-20 miles from Arvada, depending on where we are talking about. Arvada runs from foothills east, and I believe there is also some more urban country lots there, as well (though lots of subdivisions going in currently).
I think soil composition is pretty diverse and localized. For instance, I lived about 4 miles closer to the true foothills of the mountains… where I once estimated clearing about 3000 lb of rock out of 200SF of garden bed, going down about 12" and it took the excavator replacing 50’ of sewer 2 days to cut through versus 1. His comment was that they could do a sewer in the same neighborhood and hit very little rock. I think it is a factor of where mountain runoff would run historically. Where I live now, I have done quite a bit of digging and have about 1000’ of garden that has been sub soiled and tilled with basically no rock (this land was farm land in the 50’s). I’ve also hand dug holes I can fit into, and between all these, I could probably put all rocks I’ve found into a 2 gallon bucket.
My current soil is around 62% sand, 17% silt, and 21% clay, and if you want to PM me, I could send you two soil lab analysis I have had in 5 years, to give some idea. I think it is decent by local standards (nothing like what soil would be in the midwest) and produces veggies pretty well without much amendment (have added some compost and use some neem seed for nitrogen). My fruit trees on this property are not established yet, so I can’t speak to that, but my neighbor across the street has a number of 50ish year old apple, pear, peach (maybe not that old) trees that have quite a bit of production when we don’t get a late frost.
Sun… almost endless here, and intense/powerful. GREAT for growing, and there are some who can manage passive greenhouses for all but the coldest snaps… I have thought about it, but am tree challenged. Water is probably another consideration… if you want to grow a lot, know that some unincorporated lots (I’m not sure how much property you would be after) will have well water rights (and in my case I have both well and city water).
Buying property is a whole separate challenge… has been for years, but REALLY challenging at the moment. Residential property offers might be $40-100k over asking and cash buyers are up to 25% of the market, versus 17% last year.
Anyhow, not sure how much help this was but I figure more info is better than less in this case.
BTW, maybe 40-70 miles north of here used to be a major producer of montmorency cherries for the US. There is significant commercial peach production here in Colorado, but it is on the west slope near Grand Junction (also booming for land values)… climate is much more temperate there.
I’ll let others speak to SWD.
Edit to add: My soil seems to drain very well (almost too well for water spread), but if compacted, it will hold water, as well. The septic guys said my soil was amazing for drainage, for what that is worth.