If you are truly at your wits end you'd already have sold them.  I've had a few older mares that were nasty to catch but leaving them outside and alone for a few nights can change their tunes pretty fast.  This (both problems) stems from them not seeing you as head mare, sounds like some serious attitude adjusting with some round pen "reasoning" is in order for both of your "ladies."

I like John Lyons round pen methods the best.  When those legs get tired it's amazing how fast they change their way of thinking.  You might round pen them and then let them run with the herd, don't work a horse once you've caught them...it's called negative reinforcement.

Any other suggestions?

Nope.  Just going to sit here and listen to your excuses about why other folks good advice won't work "in your situation."  (That is if anyone dares offer any after that response.)

Nothing to offer here. if your not able or willing to change up your situation in order to solve problems, then your stuck.

how long has she been at that barn??? when I moved my daughters horse I could not catch him for 2 months.... I used every method possible.... finally started to use sweet feed and now I can catch him every time no problem.... but I also see him every day..... that makes a huge change in their personality.

as for the lunging... it all starts with setting who is in control... I would hobble her and then work with getting her to move ... this will get her to know that you are in control.... you can also do a lot of flexing work on the ground and this will build a level of respect as well...... I do alot of ground work with my horses but very little lunging... I think too many people lunge and don't know why they are doing it... if you spend more time working on flexing and bending/softness you will find the horse will lunge naturally because it knows who is the boss.... I hope this makes sense??? if you call me I can explain better.... 214-402-8898

I agree with this for the most part.  It is time consuming and hard work, but it pays off in the end.  I wouldn't want a 40 acre pasture to try it in, but it does work for me.

Hobbling a horse that's never had em on is not a smart idea.  And the dog collar trick?  Heck, there was a "good ol' boy" around here that used to take an old red rider (bb gun) and shoot his horse if it ran away in the pasture.  Worked, but not a well respected idea. 

oh heck, I'll wade in here.....I like Monsterhorse's suggestion, but if it is impractical to do on foot, perhaps you could use a 4 wheeler, lawnmower or some other conveyance.  I have used my truck in this type of situation.  Had new knees put in on June 18 so I'm not going to run very far or long but I will make the horse come up, even if it means using a vehicle.  Our place is 46 acres with no cross fencing so I understand the issue of the size of the field.

As to lunging, I use a lunge whip which helps the horse to turn and go on.  I point with it, smack the ground behind the horse, and if that doesn't work, then a quick smart whack on the rump.  If available, using a round pen without a lunge line, just the whip, is my preference.

And as I often do, I recommend Mark Rashid's books.  Valuable advice and wonderful stories too.

No CHASING with the Gator.  Just keep her moving, but not to the point she's freaked and flying around.  She's gonna stop every now and again and drop her head to graze - get off the dern machine and see if she's willing to aproach you - if not, follow her around summore.  Then IMMEDIATELY when she shows a sign of coming to you, you have to look unoffensive - (oh, how to make a Gator look unscary?).    So much easier to relay your body languange on foot and without an ATV.  But, gotta do what you gotta do, I guess.  How big is this pasture?  Also, don't think this miracle will happen in one short lesson.  You may have to repeat this a few times, and each time you have to back off that pressure at the right moment.  Once you do get that halter on her, lead her to the gate, praise her (treat) and that's it, lesson over.  Go home, have a beer.  Done for the day, then repeat the next day.  I preceed the reward with a big ol' whistle.  Now I whistle, they come.

My daughters mare used to run from me in the pasture.  I would just keep walking after her.  The first couple of times it took hours.  Then when I caught her I would pat her or brush her (carry the brush) right where I caught her and walk away.  If she walked away from me before I was ready we started all over.  I walked away first. 

I know it probally wont help you, but I also would catch my other horses and leave her in the field alone.  She hated it and would come to me.  The first few times I ignored her while I brushed/fed the others.  She is still not always the easiest horse to catch, but normally she will only walk away a few steps before stopping. 

Oh, and for this mare, she was abused/starved when I got her and I had to learn that when I walked up to her head she took that as an agressive move and was frightened.  Now when I approach her I look at her shoulder and talk to her.  I've had her for almost 5 years now and still if I look in her face while I approach she will start backing off.

Sounds like you've got the right idea.  It's all about pressure, and when to give.  Terry's got some good points, too.  Give it a try, and don't give up.  Soon enough she'll figger out it's easier to get caught than it is to keep away.  Good Luck!

As for your lunging issues, I'm always reluctant to give help on a forum without actually seeing the person interact with the horse. Mostly as people get offended more than they really want help with their problem. You know, the, 'No your wrong it's the horse that's the problem not me.', but I'm feeling daring and going to try anyway. Unless the horse has had an injury that makes moving in one direction less comfortable than the other, it is usually the person that is not as clear giving their signals in one direction than the other. Even an ambidextrous person that doesn't practice using both hands will have a weaker side. So I say practice lunging without the horse until you feel as comfortable holding the whip and lunge line, ask a friend to play horse, they can tell you when you are pulling on the lunge (even if you don't realise you are doing it) in both directions. Switch hands when you switch directions. Clear signals and consistency are the key. You can use your own signals, but I tend to hold the whip parallel to the ground for walk, at a 45* angle up for trot, and a 90* angle for canter. I use voice commands as well, I give them time to respond ask again, then I will hit the ground with the whip solidly until I get the desired response. I find using a 4 ft stock whip with a short popper most effective for this and way more effective than cracking a whip, and especially than hitting the horse with the whip. I keep my lunge sessions short and don't always lunge, but my horses are turned out every day.

As for catching your other horse. One of the things that works in a pasture full of horses, is go pet some of the other horses first. Your horse will often get curious and come over to you, especially if you are petting her buddy. I'd go out on the days you don't want to ride her and just pet her out in pasture and leave. I'm with you about not wanting treats in a pasture full of horses. Tends to get everyone excited and once your horse and the others are excited, just makes it harder. I like the suggestion of a treat at the gate (after exiting I'm thinking) and blowing a whistle. Make catching a pleasant experience.

I'd be careful chasing your horses around the pasture with motorized vehicles. It may work for one person, but I'd think there would be too much risk in sending your horse and the others through the fence.  Also not keen on kick chains or bb guns. But I like to keep the interactions between me and my horses as pleasant as possible.