My puzzle

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Across
  1. 3. Ceremonial place (soon)
  2. 4. Annual challenge for runners
  3. 8. Unread bridge to location
  4. 9. One who hides under a bridge
  5. 10. Good supportive animals
  6. 13. Tasty place across the border
  7. 15. Olympians race here
  8. 16. Postponed unfortunately
  9. 17. Park, or car speedster
Down
  1. 1. Desirable waterfront residence
  2. 2. Tastiest morsels
  3. 5. Neighborhood, with bridge and track
  4. 6. Rings location in New York
  5. 7. Places with many trees
  6. 11. Tree with auto diet
  7. 12. Pretty in spring
  8. 14. Mari indoor speedster vehicle