Park Office - Mark Twain
April through October (on-season)
- 10 a.m. to 4 p.m., Tuesday through Saturday
 - Closed Sunday and Monday
 
November through March (off-season)
- 10 a.m. to 4 p.m., Friday and Saturday
 - Closed Sunday through Thursday
 
  
    
    
  
  39.48836, -91.785815