PROSPECT – The Sandy River Ramblers will perform at a benefit for Friends of Fort Knox at 7 p.m. Saturday, Aug. 5 in the outdoor amphitheater and plaza at Fort Knox. Bring a chair, cushion or blanket for seating. A donation of $5 is encouraged in addition to regular park admission fees of $3 for ages 12-64, $1 for ages 5-11 and free for those under 5 and over 64. For more information call 469-6553.