On August 17, 1995, about 1245 Alaska daylight time, a tundra tire equipped Cessna 180, N9797G, nosed over during the landing roll about 25 miles northwest of Nikiski, Alaska. The airplane was being operated as a visual flight rules (VFR) cross-country personal flight when the accident occurred. The airplane, registered to and operated by the pilot, sustained substantial damage. The certificated commercial pilot and the sole passenger were not injured. Visual meteorological conditions prevailed. The flight originated from Seward, Alaska at 1030. In a telephone conversation, the pilot reported to the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) that he was landing in a remote area to go fishing. The landing area is gravel covered, about 1,000 feet long and oriented on a 090/270 degree orientation. The pilot indicated that he landed to the west and as the airplane neared the end of the landing area, he applied the brakes and began a turn at taxi speed. The left main wheel appeared to hit a soft portion of sand and the airplane nosed over. On 8/28/95, an airplane mechanic confirmed that the airplane received damage to the right wing spar, left wing rib and vertical stabilizer rib. He also reported that the left wheel brake cylinder contained contamination that prevented the brake from releasing, once pressure was applied. After cleaning, the brake cylinder functioned properly.