I searched the forums to see if there was an answer to my question but I need to some specifics as I am brand new to this, plus I'm a woman, so I need technical things spelled out, after that I am pretty handy. I bought a beginner's kit, the Woodland Scenics Scenic Ridge and it is a 3x6 layout.  They suggested an Atlas track pack that a beginner could assemble.  My train set is the Bachmann Empire Builder Santa Fe set and the engine is a Northern 4/8/4 steam locomotive.  I have laid the track inside my tunnel areas and run the locomotive (without tender) back and forth to make sure there are no problems before I build the tunnels.  The train will bog down somewhat at a few junctures of the track.  When I run my fingers along the tops of the tracks, I can feel the slightest snags.  I have checked to make sure the tracks are inside the rail connectors and they are.  These are very miniscule deviations but the little train feels them regardless.  It does not derail but I fear it will not pull a load at all or maybe derail or stall altogether once a load is attached.  Is there any thing that can be done about these snags and/or should I run more power to the other parts of the track.  I currently have just the one power attachment that came with the track pack.  Thank you for your help as I really want to enjoy my new hobby.  
ETA: here are the track contents so you can see the radii involved.  (32) 5" Straights, (7) 2-1/2" Straights, (12) 1-1/4" Straights, (4) 5/8" Straights, (14) 9-3/4" Radius, (2) Half 9-3/4" Radius, (11) 11" Radius, (3) Half 11" Radius, (5) 19" Radius, (1) Bumper, (3) Manual Standard Left Switches, (1) Warren Truss Bridge, (1) Terminal Joiner.  Don't know if that makes a difference for this particular engine but I know radius is a key factor by reading other posts.