Theme: Race originally held in Kailua-Kona - The events of the race in the order in which they are held.
19A. Pool session for grown-ups : ADULT SWIM. 2.4-mile
39A. Motorcycle designed for acrobatic maneuvers : STUNT BIKE. 112-mile
58A. Baseball play that may be foiled by a pitchout : HIT AND RUN. 26.2-mile
20D. Ironman event comprised of the last words of 19-, 39- and 58-Across : TRIATHLON. You have to complete the race in 17 hours to be an Ironman.
Argyle here, no Ironman though. We do have a stunning Tuesday puzzle. Certainly a unique grid for any day of the week.
Across:
1. Fish often dipped in wasabi : SASHIMI. "Thin slices of raw fish", from Japanese.
8. Pasadena institute where most of "The Big Bang Theory" characters work : CALTECH. (California Institute of Technology in Pasadena)
15. Meeting expectations : UP TO PAR
16. Late : OVERDUE. A punch line, "And they're all overdue".
17. Florida NASCAR city : DAYTONA
18. "Absolutely!" : "NO DOUBT!"
21. "Well, hello there" : "OH, HI"
24. Land of the Incas : PERU
25. Hoops cable channel : NBA TV
29. Catch on : LEARN
31. Disgusting : VILE. and its anagram, 32D. Wicked : EVIL
33. Aunt Bee's charge : OPIE
34. Dishwasher cycle : DRY. Is "You wash, I'll dry" a thing of the past?
35. Operatic solo : ARIA
37. City with canals : VENICE
41. What flower girls toss : PETALS. For those women followed by a train.
44. In good health : HALE
45. Underwire garment : BRA. Love a healthy bra!
No wires here.
48. Mounted on : ATOP
49. Post-shower powder : TALC
51. More than just a good buy : STEAL
53. Local news hr. : TEN PM
55. Left dreamland : WOKE
57. Slight advantage : EDGE
61. Double-crosser : TRAITOR
64. Freeway entrances : ON RAMPS
68. Bump from behind : REAR END. What can happen if someone doesn't merge smoothly on the above.
69. Champions : WINNERS. What anybody that can complete a triathlon is, no matter in what time.
70. Sticks : ADHERES
71. Cuddles : NESTLES
Down:
1. South, at the Sorbonne : SUD. French and more French, 42D. Summer, at the Sorbonne : ÉTÉ
2. Org. for shrinks : APA. (American Psychological Association)
3. Barnyard pen : STY
4. Malarkey : HOT AIR
5. Shuffle or nano : iPOD
6. "Don't be a wuss!" : "MAN UP!"
7. "The Stepford Wives" novelist : IRA LEVIN
8. Foreign service officer : CONSUL
9. Declare to be true : AVOW
10. Showed the way : LED IN
11. Glenn Miller's instrument : TROMBONE
12. Prof's email suffix : .EDU
13. Baby bear : CUB
14. Riled (up) : HET
21. Passé : OLD. Yes, you don't hear "het up" much anymore.
22. That woman : HER
23. Stable diet? : HAY. Cute.
26. Bee: Pref. : API
27. Nervous mannerism : TIC
28. Crew neck alternative : VEE
30. Part of NIH: Abbr. : NATL. (National Institutes of Health)
36. Auto body concern : RUST. More so here in the NE. Related 46D. Car-cleaning cloth : RAG
38. Scratches (out) : EKEs
39. Deep blue gem : SAPPHIRE
40. Retreat : BACK DOWN
41. Gentle touch : PAT
43. Huge amount : TON
45. Resting place : BED
47. Bar brew : ALE
50. Medals and trophies : AWARDS
52. Rent payer : TENANT
54. Bishop's hat : MITER
56. "How to Build a Classic Golf Swing" author Els : ERNIE. He tied for 35th in the US Open.
59. Sound of music : TONE. TUNE was close but....
60. Footed vases : URNS
61. __-la-la : TRA
62. Color to stop at : RED
63. "That feels good!" : "AAH!"
65. "Spaceballs" director Brooks : MEL
66. Start to heat? : PRE
67. Cobra's warning : [SSS!]
Argyle
Note from C.C.:
Below is my original skeletal grid. Rich suggested me to intersect theme entries. He made me look clever. Thanks, Rich!