i am pretty new to mtb but i've done a few events so far. i find that when ever the terrain gets a bit to techinical i have to get off my bike walk around it and then hop back on. this frustrates me, especially when going up a hill and i lose all my momentum. so any advice on how to get over things like logs without having to dismount. and other things like lose soil and getting though without fishtaling it a tree.