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BOSTON MARATHON 2023

Krystal Buck

Bib: 12868•F

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 38%
Gender (Female)
#0 / 11423
Top 19%
Division (F18-39)
#0 / 4884
Top 34%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:59
Rank: #11634
Start → 5K
23:59 | 7:43/mi
10K· 6.21 mi
47:39
Rank: #11509 (+125)
5K → 10K
23:40 | 7:37/mi
15K· 9.32 mi
1:11:02
Rank: #11115 (+394)
10K → 15K
23:23 | 7:32/mi
20K· 12.43 mi
1:34:34
Rank: #10788 (+327)
15K → 20K
23:32 | 7:34/mi
Half· 13.11 mi
1:39:45
Rank: #10805 (-17)
20K → Half
5:11 | 7:36/mi
25K· 15.53 mi
1:58:18
Rank: #10615 (+190)
Half → 25K
18:33 | 7:39/mi
30K· 18.64 mi
2:22:56
Rank: #10503 (+112)
25K → 30K
24:38 | 7:56/mi
20M
2:33:47
Rank: #10474 (+29)
30K → 20M
10:51 | 7:59/mi
21M
2:42:29
Rank: #10517 (-43)
20M → 21M
8:42 | 8:42/mi
35K· 21.75 mi
2:48:18
Rank: #10491 (+26)
21M → 35K
5:49 | 7:46/mi
23M
2:58:20
Rank: #10425 (+66)
35K → 23M
10:02 | 8:01/mi
24M
3:05:59
Rank: #10332 (+93)
23M → 24M
7:39 | 7:39/mi
40K· 24.85 mi
3:12:48
Rank: #10292 (+40)
24M → 40K
6:49 | 7:58/mi
25.2M
3:15:44
Rank: #10258 (+34)
40K → 25.2M
2:56 | 8:30/mi
Finish· 26.22 mi
3:23:24
Rank: #10169 (+89)
25.2M → Finish
7:40 | 7:31/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:45
Pace7:37 /mi
2nd Half
Distance13.11 mi
Time1:43:39
Pace7:54 /mi
📊Positive Split: 3.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:4123:597:4323:59
7:43
-
10K
6.21 mi11:15:2147:397:4023:40
7:37
-0:06
15K
9.32 mi11:38:441:11:027:3723:23
7:32
-0:05
20K
12.43 mi12:02:161:34:347:3723:32
7:34
+0:02
Half
13.11 mi12:07:271:39:457:375:11
7:36
+0:02
25K
15.53 mi12:26:001:58:187:3718:33
7:39
+0:03
30K
18.64 mi12:50:382:22:567:4024:38
7:56
+0:17
20M
20.00 mi13:01:292:33:477:4110:51
7:59
+0:03
21M
21.00 mi13:10:112:42:297:448:42
8:42
+0:43
35K
21.75 mi13:16:002:48:187:445:49
7:46
-0:56
23M
23.00 mi13:26:022:58:207:4510:02
8:01
+0:15
24M
24.00 mi13:33:413:05:597:457:39
7:39
-0:22
40K
24.85 mi13:40:303:12:487:456:49
7:58
+0:19
25.2M
25.20 mi13:43:263:15:447:462:56
8:30
+0:32
Finish
26.22 mi13:51:063:23:247:467:40
7:31
-0:59

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:31 /mi

Average Pace

7:46 /mi

Slowest Pace

8:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:11:46

94% of race

Time at Steady Pace

11:38

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:45 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:51:4123:597:4323:59
7:43
#11634
10K
6.21 mi11:15:2147:397:4023:40
7:37
#11509
15K
9.32 mi11:38:441:11:027:3723:23
7:32
#11115
20K
12.43 mi12:02:161:34:347:3723:32
7:34
#10788
Half
13.11 mi12:07:271:39:457:375:11
7:36
#10805
25K
15.53 mi12:26:001:58:187:3718:33
7:39
#10615
30K
18.64 mi12:50:382:22:567:4024:38
7:56
#10503
20M
20.00 mi13:01:292:33:477:4110:51
7:59
#10474
21M
21.00 mi13:10:112:42:297:448:42
8:42
#10517
35K
21.75 mi13:16:002:48:187:445:49
7:46
#10491
23M
23.00 mi13:26:022:58:207:4510:02
8:01
#10425
24M
24.00 mi13:33:413:05:597:457:39
7:39
#10332
40K
24.85 mi13:40:303:12:487:456:49
7:58
#10292
25.2M
25.20 mi13:43:263:15:447:462:56
8:30
#10258
Finish
26.22 mi13:51:063:23:247:467:40
7:31
#10169
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi116342658265810399(Top 39%)2026(Top 18%)2026(Top 41%)
10K6.21 mi3.10 mi11509+1252607+512607+5111492(Top 43%)2594(Top 23%)2594(Top 53%)
15K9.32 mi3.11 mi11115+3942398+2092398+20910399(Top 39%)2026(Top 18%)2026(Top 41%)
20K12.43 mi3.11 mi10788+3272243+1552243+1559921(Top 37%)1880(Top 16%)1880(Top 38%)
Half13.11 mi0.68 mi10805-172247-42247-411038(Top 41%)2380(Top 21%)2380(Top 49%)
25K15.53 mi2.42 mi10615+1902155+922155+929930(Top 37%)1976(Top 17%)1976(Top 40%)
30K18.64 mi3.11 mi10503+1122154+12154+110356(Top 39%)2330(Top 20%)2330(Top 48%)
20M20.00 mi1.36 mi10474+292160-62160-610171(Top 38%)2311(Top 20%)2311(Top 47%)
21M21.00 mi1.00 mi10517-432211-512211-5111672(Top 44%)3223(Top 28%)3223(Top 66%)
35K21.75 mi0.75 mi10491+262211221110496(Top 39%)2596(Top 23%)2596(Top 53%)
23M23.00 mi1.25 mi10425+662210+12210+19851(Top 37%)2435(Top 21%)2435(Top 50%)
24M24.00 mi1.00 mi10332+932189+212189+218789(Top 33%)2001(Top 18%)2001(Top 41%)
40K24.85 mi0.85 mi10292+402198-92198-99896(Top 37%)2594(Top 23%)2594(Top 53%)
25.2M25.20 mi0.35 mi10258+342191+72191+79629(Top 36%)2512(Top 22%)2512(Top 51%)
Finish26.22 mi1.02 mi10169+892181+102181+108752(Top 33%)2132(Top 19%)2132(Top 44%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 39%
×21stories
+97ft-345ft

Overall

10399

Females

2026

F18-39

2026

5K→10K

3.1 - 6.2 mi

Top 43%
×5stories
+79ft-138ft

Overall

11492

Females

2594

F18-39

2594

10K→15K

6.2 - 9.3 mi

Top 39%
×3stories
+67ft-78ft

Overall

10399

Females

2026

F18-39

2026

15K→20K

9.3 - 12.4 mi

Top 37%
×5stories
+106ft-86ft

Overall

9921

Females

1880

F18-39

1880

20K→Half

12.4 - 13.1 mi

Top 41%
×2stories
+19ft-37ft

Overall

11038

Females

2380

F18-39

2380

Half→25K

13.1 - 15.5 mi

Top 37%
×4stories
+66ft-88ft

Overall

9930

Females

1976

F18-39

1976

25K→30K

15.5 - 18.6 mi

Top 39%
×9stories
+181ft-148ft

Overall

10356

Females

2330

F18-39

2330

30K→20M

18.6 - 20.0 mi

Top 38%
×5stories
+64ft-50ft

Overall

10171

Females

2311

F18-39

2311

20M→21M

20.0 - 21.0 mi

Top 44%
×8stories
+106ft-24ft

Overall

11672

Females

3223

F18-39

3223

21M→35K

21.0 - 21.8 mi

Top 39%
×7stories
+17ft-86ft

Overall

10496

Females

2596

F18-39

2596

35K→23M

21.8 - 23.0 mi

Top 37%
×5stories
+23ft-63ft

Overall

9851

Females

2435

F18-39

2435

23M→24M

23.0 - 24.0 mi

Top 33%
×6stories
+12ft-82ft

Overall

8789

Females

2001

F18-39

2001

24M→40K

24.0 - 24.9 mi

Top 37%
×1story
+6ft-20ft

Overall

9896

Females

2594

F18-39

2594

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

9629

Females

2512

F18-39

2512

25.2M→Finish

25.2 - 26.2 mi

Top 33%
×2stories
+22ft-21ft

Overall

8752

Females

2132

F18-39

2132

Passing Analysis

Category:
Athletes Passed
2341*
Passed By
876
Net Change
+1465
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11634
5K → 10K362237+125#11634#11509
10K → 15K44450+394#11509#11115
15K → 20K35629+327#11115#10788
20K → Half2340-17#10788#10805
Half → 25K22838+190#10805#10615
25K → 30K223111+112#10615#10503
30K → 20M87*58+29#10503#10474
20M → 21M68111-43#10474#10517
21M → 35K6337+26#10517#10491
35K → 23M11145+66#10491#10425
23M → 24M11421+93#10425#10332
24M → 40K8646+40#10332#10292
40K → 25.2M51*17+34#10292#10258
25.2M → Finish12536+89#10258#10169
TOTALS2341*876+1465

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing