I fished the NF of the Thornton from the Park line up - Harry Murray was right, very limited parking. conditions were not ideal - bright sun, low water and no deciduous canopy on the trees.
This was a typical mountain stream, a lot of pools, downed wood and small falls. I had one nice fish take and miss an EHC in the shade of a big rock, but that was it apart from redbands and chubs rushing the fly. I also tried a patriot dry, adams irresistible, mink and caddis nymphs...I did see a small brookie or two (4-5") under ledges deep in some pools, which is where I guess the larger ones were too.
I quit after 2 hours and walked the trail back down. with no cell signal and I'd forgotten the map, I struggled to find the Piney 'river' as shown on the SNP map - its local name is Piney Run and it was very small and very low.
So I headed down 231 to the Hughes river - slightly wider than the Thornton, but again pretty lower and no canopy. I stopped and took a few casts around the rock shelves but saw and hooked only a redband. I drove further up to the trail head but the lot was full and walkers were everywhere as it was saturday. so I decided to go look at the Hazel.
I found my way to the Park gate at Hungry Horse lane and had a few casts there and got another chub, but I'd run out of time with all the driving around. it looked pretty nice up there and I would hike up it I think.
In hindsight, I should have fished from Skyline drive down - under the coniferous canopy, and where there may have been more water - all three streams - the Thornton, Hughes and Hazel had less water lower down, due to residential wells perhaps ? or perhaps fish the Rose or the Rapidan.
Andy - Hogcamp branch perhaps ?
cheers
Mark.