Good to hear from other allergy sufferers.  I've had bad pollen allergies almost all my life as well, and I have been running regularly for the last 12+ years.  Fortunately for me, the very bad spring allergy season (generally April and May for me) seems to be over now.  But for most of the past 6+ weeks, along with showering immediately after my run and clearing out my nose with a neti pot with water and baking soda, I ran with a tissue or soft napkin stuffed up my nose.  Looks ridiculous, but my allergies are very bad at that time of year, and I hate treadmills and don't have access to any.  I would just rip off a portion of the tissue or napkin just big enough to stuff into my nostrils.  This helped my nose a lot.  My nose would have been dripping and sneezing constantly otherwise.  Now if there were something I could do for my eyes, which would often get really red and puffy by the end of my runs ...

As for the sun, I normally run at night during the week due to getting off work late, and on weekends, I head out for my run 40-60 minutes before sunset in order to avoid the sun.  When the weather was not so warm, I sometimes ran during the day on weekends with a baseball cap and coverings for my arms and neck.

Have either of you considered allergy shots?  I would like to get them in the longer term, but they are expensive and only partially covered by insurance, so I am saving up my money first.

Have you tried something like Flonase or Nasonex?  I used to get a lot of nasal discharge followed by really bad congestion, to the point that I could not breathe through my nose for weeks.  Since I started using Flonase that has gone away and the antihistamine I take (Zyrtec) seems more effective.  I doubt it would work if the problem is in your lungs but it has really relieved my nasal symptoms.

Len