Avg spd 16.2 mph ( with SW headwinds for most of route; good for cooling, bad for aerodynamics ! ) at 10 mile marker (Howe Park). (Today's HR for 10-mile marker segment not available as I forgot the chest sensor once again ( left it at home; need a pre-ride checklist procedure ! ) .) Avg speed build-up as ride progressed: at end of Ash St 11.0 mph; corner of E Charlton & Bacon Hill Rd 12.0 mph; E Charlton & Old Spencer Rd (town line) 13 mph; end of Old Spencer Rd (at Rt 31) 14 mph; bottom of downhill trough on N Sturbridge Rd (just before Osgood Rd) 15 mph; corner of Briarcliff Ln & Bacon Hill Rd near railroad underpass 15.5 mph; end of Cranberry Meadow Rd at railroad overpass (just caught end of west-bound freight train ( a la Superman ! )) 16 mph; Howe Park (at turn onto Lyford Rd uphill just before railroad overpass) 16.2 mph (end of 10.3 mile training route #1). Muggy, tropical-like air mass, overcast and haze, w/ fog earlier in morning, air temp 73 F, dew pt 70 F, winds SW 15 mph (weather conditions for ride home: Ptly cloudy, haze, air temp 75 , dew pt still 70 F , winds S and SW 15 mph, with gusts to 21. Tree leaf drop has started already from the weaker / dying trees, and some early fall foliage color starting to appear with the younger trees along the rivers and in the swampy / wet areas near the rivers and streams.