| Competition | 1977 USA Swimming National Championships (Outdoor/LCM) | 
|---|---|
| Venue | Mission Viejo, California | 
| Held | 19 August 1977 | 
| Status | Medal | 
| Competitors | 4 | 
| Countries | 2 | 
Mission Viejo, California / Marguerite Aquatic Center / long-course metric (50m)
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Nashville Aquatic Club | 4:17.60 | * | ||
| Joan Pennington | 1:06.86 | ||||
| Tracy Caulkins | 1:12.11 | ||||
| Karinne Miller | 1:01.18 | ||||
| Amy Caulkins | 57.45 | ||||
| 🥈 | Mission Viejo Nadadores | 4:23.27 | |||
| 🥉 | Australia | 4:23.97 |