While proximate cause is ordinarily a question of fact for the trier of fact, it may be determined as a matter of law where reasonable minds can reach but one conclusion regarding causation. Riley v. Am. Honda Motor Co., 259 Mont. 128, 130, 856 P.2d 196, 197 (1993). On appeal, the findings of the trial court are presumed to be correct if supported by substantial evidence. The appellate court will not reverse the trial court absent a showing that its determinations are clearly erroneous. Mont. R. Civ. P. 52(a). Young v. Flathead Cnty., 232 Mont. 274, 276, 757 P.2d 772, 773 (1988). See also Riley v. Am. Honda Motor Co., 259 Mont. 128, 133, 856 P.2d 196, 199 (1993) Krueger v. General Motors Corps., 240 Mont. 266, 278, 783 P.2d at 1348 (1989) ("On appeal, we determined that substantial evidence supported the jury's finding of proximate cause.)