Can you do any endurance work on the elliptical? Will that help at all? Not sure if that's any easier on injuries than the pavement.
Alternatively, you could start thinking of a new goal that happens a little bit later. Depressing, sure, but if you heal up completely, new goals will be there waiting for you.
In an attempt to avoid being Helpy, I will just say: sympathies!
Yah -- I've got a doctor my insurance company paid thousands of dollars to be helpy.
I wish you luck with your continued recovery, you have earned this. And I know this isn't a fitness blog and I'm a stranger on the internet, but I just wanted to tell you that your efforts and your work to recover are really inspiring to me. Tomorrow I'm doing my first race. I's a mud run obstacle course and I'm kind of nervous about it, but mainly I'm excited that one day I might also be working up to a ten mile run. So thank you for sharing these things with us.
go go go! and when you cross that finish line throw your arms up in the air and say "I DID THIS!"
(try not to swallow any mud while you're doing it.)
"I feel like I've been through fire and up mountains for this -- and I've turned this body from a lump of clay into something that moves fast and goes far"
Okay, now re-read that part. That last bit, after the dash, is what you passed through fire and climbed mountains for. You think it's this race, but it's not. Your new, strong, fast, flexible body is what you've earned, and it will only get better. You're not nearing the end of this journey--you've only just set out. There are wonderful adventures and rewards ahead (like seeing Central Park from a runner's perspective!).
But you have to be able to continue the journey. This injury is only a delay in it, and will pass, as long as you listen to what your traveling companion--your body--has to say. Think of this period of being careful as an investment, not in one race medal, but a wall of them, a collection of souvenirs, memories, and participants' t-shirts.
Whatever else happens, you're a runner now. That's the beginning. You're on the trail. Let it lead you.
I don't want you to have another sports related injury! I think that you're pretty inspirational. And, you're an adult, so it's up to you to decide whether or not you can do this upcoming race. Even if you poop out, you're still doing something you couldn't have imagined a year ago.
I had my exciting fit moment a few weeks ago. I visited Britain and climbed tot he top of the Glastonbury Tor (supposedly where Avalon was). I had to stop a bunch of times along the way, and it was really horrible and windy and cold at the top, but when I got there, I was excited because I did it! You've done so much. You can do a lot more in the future if you're not injured from pushing too hard in the 10 mile race, even if it is the 10 mile race you've been working for and excited about all this time.
I am totally not an athlete, but as a person who has been on-again, off-again with regular exercise generally, it's my experience that it's always about building up endurance, hitting an obstacle that causes you to lose it, and then building back up again. The two steps forward, one back thing. If you keep going you will build up.. but I don't think I've yet met the person who hasn't dealt with setback after setback on their way to whatever their fitness goal is. The rarer people are the ones who don't let the setbacks put them off their game, whatever their game happens to be. You are one of those. You've done a LOT already, and if this race isn't at the right time.. if you take care of your body you will go farther and farther. Sometimes it takes more, different, strength/endurance to rest when you need to!
You could swim or use an exercise bike to get your endurance back, but that won't help the leg get stronger.
Don't push yourself past what you can do - it's not worth an injury. Srsly.
All I can say, having had leg and ankle and foot injuries/breaks, I know you're itching to get back to what you were doing before DO NOT RUSH YOUR HEALING. I broke a few bones in my foot and was like 'I can keep on keeping on, my time in the boot is almost over, I can go hiking'. I did. And now I have a foot that constantly aches when the weather changes and can't tolerate substantial weight bearing. I screwed up the healing and I'll be bothered by it for a long while.
Feet and legs take a long long while to heal and are very very fussy. Do not rush if you'd like to get back to what you had before.
You HAVE earned it. And hopefully your body will be ready. And it will suck, suck,suck if you can't do the Broad Street Run this year. But you can use that for motivation to improve yourself, improve your form, your stretching, your cross-training, so you can do the race next year. And the year after that. You're running for life, not just for this next race.