Good things to know.

I'll put maps and other random information here, and update as I get more.    

Our goal was to make this a series of 5 mile hikes.  Don't be surprised if they're longer!

This is our route:
http://www.gmap-pedometer.com/?r=6320525

Greenway maps:
http://mtsgreenway.org/about/maps/RegionTrails.pdf
http://mtsgreenway.org/our-work/outdoor-recreation/regional-trails
http://your.kingcounty.gov/ftp/gis/Web/VMC/recreation/RegionalTrailsMap_2008_mapside.pdf
http://www.parks.wa.gov/publications/trails/John%20Wayne%20Pioneer%20Trail.pdf

Snoqualmie pass area maps:  

http://fsgeodata.fs.fed.us/rastergateway/states-regions/grid_zoom.php?regionID=r6&gridSrc=47121

http://your.kingcounty.gov/ftp/gis/web/vmc/recreation/BCT_RattlesnakeMtn_brochure.pdf

Snoqualmie Valley trail map:

http://www.duvallwa.gov/appsformspubs/SnoqValleyTrailMap.pdf

Tolt pipeline map, it's a little out of date:
http://www.kingcounty.gov/~/media/operations/archives/images/maps/tolt_pipeline_trail.ashx

Burke-Gilman Trail, nice interactive map:
http://transparentfog.com/trails/

Discovery Park map:
https://docs.google.com/a/friendsdiscoverypark.org/viewer?a=v&pid=sites&srcid=ZnJpZW5kc2Rpc2NvdmVyeXBhcmsub3JnfGZyaWVuZHMtb2YtZGlzY292ZXJ5LXBhcmt8Z3g6MjIzZTNkMDk2NDk1Y2ViYQ 

Calculate distances:
http://milermeter.com/

Parking permit info:
State parks require a Discover pass to park.  National Forest trailheads require a Northwest Forest pass to park.  Often you can buy them at the trailhead, but not always.  Sometimes you need a credit card and sometimes cash.  I'll post details with each hike.

http://mtsgreenway.org/blog/the-where-what-and-hows-of-rec-passes

http://www.fs.usda.gov/detail/r6/passes-permits/recreation/?cid=fsbdev2_027026

Etc:

http://www.mountaineers.org/forms/hiking_basics_brochure.pdf