Remember that trail. Keep at it and riding skills will go up- You will learn to fall properly and those Head sized rocks will be your markers on where the trail actually is.
One thing about the area where I live is that we have Flints. The winter weather seems to make them grow. and a trail you did with ease one week suddenly has a Football sized flint right in the wrong place. Not just one but the only area I know where I do not trust the flints is on part of the South Downs way. Football sized and they are mobile. It is easier to climb that section of the trail than it is to ride down.
Not a believer in wide tyres on MTB's but Drop in pressure down to just above snakebites- and sensible riding- and you will wonder what the problem is- this time next year. I use 1.8 tyres at 50 psi in summer and winter and they work for me. Wheras a heavier rider would have to use 2.1's.
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How long was I in the army? Five foot seven.
Spike Milligan