OK. So we have some parallels. I’m also 30 years old, with a history of barbell lifting from ages 13-22 (HS and college football), some distance running experience, then got into kettlebell stuff, and lately swinging into a combination of all three things (barbells, kettlebells, and running). I’ve also done some of those trail races before, for what it’s worth. I’m (mostly) working on strength at the moment, but also trying to keep the ability to run a little ways. Here’s the loose template I’ve been doing the last few weeks:
Monday - short run (2-4 miles)
Tuesday - kettlebell workout at home
Wednesday - light deadlift (i.e. 10 singles at 315)
Thursday - kettlebell workout or short run (2-4 miles)
Friday - kettlebell workout or short run (2-4 miles)
Saturday - long run (6-8 miles)
Sunday - heavy deadlift (up to 495+ for a couple singles)
I know that’s pretty vague, and our goals are not necessarily identical, merely pointing out that this has worked well for me and that I’ve been OK doing heavy deadlifts and running within the same week.
As for your program: I think that looks quite reasonable. It really depends on how much you’re prioritizing the respective goals, but I believe that you can make some degree of progress with a good hard squat on Monday, a good hard deadlift on Friday, and getting one short run in (Tuesday?) and one longer run on Saturday or Sunday. In the past, during one training cycle when I was coming off an injury I ran a respectable half-marathon (1:35, only a few minutes off my PR of 1:27) by running three days a week (5 miles / 5 miles / 10 miles) with no special speed work or anything. So I’m sure you’ll be able to complete things like a Spartan Race if you lift as you have described here, get a 4-mile run on Tuesday and an 8-mile run on Saturday, and maybe get a little bonus conditioning like hill sprints (since most trail races are dependent on ability to handle some brutal terrain).