160.6800 (3838), UP Fremont Local/Switcher
161.2450 (0909) & 161.2650 (7777), Fremont Dinner Train/FEVR
BNSF Fremont Local/Switcher can occasionally be found on 161.1000 (6666) and as mentioned above, 161.2350 (7575).
UP 160.7400 (4242) also extends west past Fremont to MP (CPB 096), west of Duncan, Ne
Another way to find more railroad activity, hit the search function, start at 159.8100 to 161.5650. Occasionally locals and switch crews do use other frequencies if there is a lot of radio traffic.