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BOSTON MARATHON 2023

Kelsey Lacross

Bib: 20059•F

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 49%
Division (F40-44)
#0 / 1878
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:26
Rank: #17616
Start → 5K
8:30/mi
26:26 split
10K· 6.21 mi
52:10
Rank: #17187 (+429)
5K → 10K
8:17/mi
25:44 split
15K· 9.32 mi
1:18:13
Rank: #17153 (+34)
10K → 15K
8:23/mi
26:03 split
20K· 12.43 mi
1:45:01
Rank: #17258 (-105)
15K → 20K
8:38/mi
26:48 split
Half· 13.11 mi
1:50:51
Rank: #17303 (-45)
20K → Half
8:33/mi
5:50 split
25K· 15.53 mi
2:11:48
Rank: #17232 (+71)
Half → 25K
8:38/mi
20:57 split
30K· 18.64 mi
2:40:16
Rank: #17345 (-113)
25K → 30K
9:10/mi
28:28 split
20M
2:52:44
Rank: #17351 (-6)
30K → 20M
9:10/mi
12:28 split
21M
3:02:39
Rank: #17368 (-17)
20M → 21M
9:55/mi
9:55 split
35K· 21.75 mi
3:09:31
Rank: #17433 (-65)
21M → 35K
9:11/mi
6:52 split
23M
3:21:34
Rank: #17535 (-102)
35K → 23M
9:37/mi
12:03 split
24M
3:30:47
Rank: #17602 (-67)
23M → 24M
9:13/mi
9:13 split
40K· 24.85 mi
3:39:03
Rank: #17697 (-95)
24M → 40K
9:40/mi
8:16 split
25.2M
3:42:30
Rank: #17701 (-4)
40K → 25.2M
10:00/mi
3:27 split
Finish· 26.22 mi
3:51:43
Rank: #17719 (-18)
25.2M → Finish
9:03/mi
9:13 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:51
Pace8:27 /mi
2nd Half
Distance13.11 mi
Time2:00:52
Pace9:13 /mi
📊Positive Split: 9.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:5526:268:3026:26
8:30
-
10K
6.21 mi11:46:3952:108:2425:44
8:17
-0:13
15K
9.32 mi12:12:421:18:138:2426:03
8:23
+0:06
20K
12.43 mi12:39:301:45:018:2726:48
8:38
+0:15
Half
13.11 mi12:45:201:50:518:275:50
8:33
-0:05
25K
15.53 mi13:06:172:11:488:2920:57
8:38
+0:05
30K
18.64 mi13:34:452:40:168:3628:28
9:10
+0:32
20M
20.00 mi13:47:132:52:448:3812:28
9:10
0:00
21M
21.00 mi13:57:083:02:398:429:55
9:55
+0:45
35K
21.75 mi14:04:003:09:318:436:52
9:11
-0:44
23M
23.00 mi14:16:033:21:348:4612:03
9:37
+0:26
24M
24.00 mi14:25:163:30:478:479:13
9:13
-0:24
40K
24.85 mi14:33:323:39:038:498:16
9:40
+0:27
25.2M
25.20 mi14:36:593:42:308:503:27
10:00
+0:20
Finish
26.22 mi14:46:123:51:438:519:13
9:03
-0:57

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

8:17 /mi

Average Pace

8:51 /mi

Slowest Pace

10:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:11:48

57% of race

Time at Steady Pace

1:06:14

29% of race

Time at Slower Pace

33:41

15% of race

Average Pace: 8:50 /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 mi11:20:5526:268:3026:26
8:30
#17616
10K
6.21 mi11:46:3952:108:2425:44
8:17
#17187
15K
9.32 mi12:12:421:18:138:2426:03
8:23
#17153
20K
12.43 mi12:39:301:45:018:2726:48
8:38
#17258
Half
13.11 mi12:45:201:50:518:275:50
8:33
#17303
25K
15.53 mi13:06:172:11:488:2920:57
8:38
#17232
30K
18.64 mi13:34:452:40:168:3628:28
9:10
#17345
20M
20.00 mi13:47:132:52:448:3812:28
9:10
#17351
21M
21.00 mi13:57:083:02:398:429:55
9:55
#17368
35K
21.75 mi14:04:003:09:318:436:52
9:11
#17433
23M
23.00 mi14:16:033:21:348:4612:03
9:37
#17535
24M
24.00 mi14:25:163:30:478:479:13
9:13
#17602
40K
24.85 mi14:33:323:39:038:498:16
9:40
#17697
25.2M
25.20 mi14:36:593:42:308:503:27
10:00
#17701
Finish
26.22 mi14:46:123:51:438:519:13
9:03
#17719
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi176166329632917066(Top 64%)5964(Top 52%)5964(Top 318%)
10K6.21 mi3.10 mi17187+4296045+2846045+28416826(Top 63%)5765(Top 50%)5765(Top 307%)
15K9.32 mi3.11 mi17153+346003+426003+4217066(Top 64%)5964(Top 52%)5964(Top 318%)
20K12.43 mi3.11 mi17258-1056085-826085-8217664(Top 66%)6326(Top 55%)6326(Top 337%)
Half13.11 mi0.68 mi17303-456105-206105-2018043(Top 68%)6507(Top 57%)6507(Top 346%)
25K15.53 mi2.42 mi17232+716079+266079+2617062(Top 64%)6046(Top 53%)6046(Top 322%)
30K18.64 mi3.11 mi17345-1136156-776156-7717998(Top 68%)6649(Top 58%)6649(Top 354%)
20M20.00 mi1.36 mi17351-66189-336189-3317441(Top 66%)6420(Top 56%)6420(Top 342%)
21M21.00 mi1.00 mi17368-176216-276216-2717733(Top 67%)6602(Top 58%)6602(Top 352%)
35K21.75 mi0.75 mi17433-656263-476263-4718662(Top 70%)7192(Top 63%)7192(Top 383%)
23M23.00 mi1.25 mi17535-1026343-806343-8018832(Top 71%)7306(Top 64%)7306(Top 389%)
24M24.00 mi1.00 mi17602-676398-556398-5518130(Top 68%)6966(Top 61%)6966(Top 371%)
40K24.85 mi0.85 mi17697-956456-586456-5818930(Top 71%)7453(Top 65%)7453(Top 397%)
25.2M25.20 mi0.35 mi17701-46464-86464-817436(Top 65%)6669(Top 58%)6669(Top 355%)
Finish26.22 mi1.02 mi17719-186486-226486-2218199(Top 68%)7006(Top 61%)7006(Top 373%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21stories
+97ft-345ft

Overall

17066

Females

5964

F40-44

5964

5K→10K

3.1 - 6.2 mi

Top 63%
×5stories
+79ft-138ft

Overall

16826

Females

5765

F40-44

5765

10K→15K

6.2 - 9.3 mi

Top 64%
×3stories
+67ft-78ft

Overall

17066

Females

5964

F40-44

5964

15K→20K

9.3 - 12.4 mi

Top 66%
×5stories
+106ft-86ft

Overall

17664

Females

6326

F40-44

6326

20K→Half

12.4 - 13.1 mi

Top 68%
×2stories
+19ft-37ft

Overall

18043

Females

6507

F40-44

6507

Half→25K

13.1 - 15.5 mi

Top 64%
×4stories
+66ft-88ft

Overall

17062

Females

6046

F40-44

6046

25K→30K

15.5 - 18.6 mi

Top 68%
×9stories
+181ft-148ft

Overall

17998

Females

6649

F40-44

6649

30K→20M

18.6 - 20.0 mi

Top 66%
×5stories
+64ft-50ft

Overall

17441

Females

6420

F40-44

6420

20M→21M

20.0 - 21.0 mi

Top 67%
×8stories
+106ft-24ft

Overall

17733

Females

6602

F40-44

6602

21M→35K

21.0 - 21.8 mi

Top 70%
×7stories
+17ft-86ft

Overall

18662

Females

7192

F40-44

7192

35K→23M

21.8 - 23.0 mi

Top 71%
×5stories
+23ft-63ft

Overall

18832

Females

7306

F40-44

7306

23M→24M

23.0 - 24.0 mi

Top 68%
×6stories
+12ft-82ft

Overall

18130

Females

6966

F40-44

6966

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

18930

Females

7453

F40-44

7453

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1story
+13ft-16ft

Overall

17436

Females

6669

F40-44

6669

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2stories
+22ft-21ft

Overall

18199

Females

7006

F40-44

7006

Passing Analysis

Category:
Athletes Passed
1629
Passed By
1732
Net Change
-103
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17616
5K → 10K591162+429#17616#17187
10K → 15K202168+34#17187#17153
15K → 20K133238-105#17153#17258
20K → Half1762-45#17258#17303
Half → 25K15382+71#17303#17232
25K → 30K128241-113#17232#17345
30K → 20M9197-6#17345#17351
20M → 21M7996-17#17351#17368
21M → 35K3398-65#17368#17433
35K → 23M64166-102#17433#17535
23M → 24M38105-67#17535#17602
24M → 40K28123-95#17602#17697
40K → 25.2M2529-4#17697#17701
25.2M → Finish4765-18#17701#17719
TOTALS16291732-103
📊

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