Calling all flatlanders! In an ideal world, all of us hill-loving, marathon-running folks would have a road or trail to train on regularly that had just the right blend of elevation gain and loss to provide the right conditions for becoming race-ready. Those long-distance runs would replicate the conditions you’ll have when you line up at the starting line. But, if you’re anything like me, you might be living in an area where that’s just not the case. Or maybe you do have some hills nearby…