This is something I happen to have quite a bit of experience with (5 of my online clients are either ultra-distance runners or competitive marathon runners).  A big problem with most distance runners is their rate of force development and amount of power per step.  Furthermore, most distance runners have some of the weakest bone structures out of any athlete so lifting is extremely important to them (yet most don’t do it).

With my runners I have them lift twice a week, 5 utilization runs (longer distance) focusing on building their aerobic base, and 1 Anaerobic Theshold workout building their ability to handle lactate byproducts from running during longer races near maximal heart rates.  This is for people who are working full time jobs and really all they can dedicate towards their training.  My ultra-marathon runner gets 3 lifts a week, 8 runs, and 1 AT session (on average during the off-season) as he is a bit more competitive and has a bit more time to dedicate (sponsored runner).

I generally like to have them lift Mon/Thurs with a solid tempo run afterwards to help promote recovery.  Most of their lifting is on increasing their power production and is dependent upon where they are in their training cycle and season.  In general though they’re really hammering the posterior chain and focusing on fixing imbalances with their accessory work.  

One of their aerobic runs a week is done on a treadmill and we do video analysis for their gait and stride.

So that’s the general breakdown of how I train most of my competitive running clients.

Again focus on your weaknesses with your lift, fixing imbalances, and improving your posterior chain strength.

Hope this helped!