The River Mountain Trail loop looks challenging, we've nothing like it where I live. Hills yes, but they are short in comparison. Carrying an extra ten pound battery wouldn't be my choice. I guess you'll just have to be a in bike mode more often on the flats and use your power when climbing. Alternatively, take your charger along, find a power source along the way and take an extra hour for lunch!! Thanks for info on the BMS number, strange the range isn't from fifteen to zero but I had guessed somewhere in the low 40's would mean an empty battery. These blogs have been very helpful in better understanding our bikes, keep your experiences coming. For those reading and still deciding on which bike to purchase, you won't regret an E-Glide ST purchase.