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BOSTON MARATHON 2023

Maegan Krifchin

Bib: 131•F

GA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 0.9%
Gender (Female)
#0 / 11423
Top 0.2%
Division (F18-39)
#0 / 4884
Top 0.5%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:47
Rank: #286
Start → 5K
17:47 | 5:43/mi
10K· 6.21 mi
34:51
Rank: #204 (+82)
5K → 10K
17:04 | 5:30/mi
15K· 9.32 mi
52:20
Rank: #198 (+6)
10K → 15K
17:29 | 5:38/mi
20K· 12.43 mi
1:10:23
Rank: #216 (-18)
15K → 20K
18:03 | 5:49/mi
Half· 13.11 mi
1:14:21
Rank: #225 (-9)
20K → Half
3:58 | 5:49/mi
25K· 15.53 mi
1:28:39
Rank: #246 (-21)
Half → 25K
14:18 | 5:54/mi
30K· 18.64 mi
1:47:25
Rank: #272 (-26)
25K → 30K
18:46 | 6:02/mi
20M
1:55:37
Rank: #273 (-1)
30K → 20M
8:12 | 6:02/mi
21M
2:01:57
Rank: #270 (+3)
20M → 21M
6:20 | 6:20/mi
35K· 21.75 mi
2:06:19
Rank: #271 (-1)
21M → 35K
4:22 | 5:50/mi
23M
2:14:03
Rank: #274 (-3)
35K → 23M
7:44 | 6:11/mi
24M
2:19:52
Rank: #264 (+10)
23M → 24M
5:49 | 5:49/mi
40K· 24.85 mi
2:25:02
Rank: #254 (+10)
24M → 40K
5:10 | 6:03/mi
25.2M
2:27:10
Rank: #246 (+8)
40K → 25.2M
2:08 | 6:11/mi
Finish· 26.22 mi
2:32:46
Rank: #232 (+14)
25.2M → Finish
5:36 | 5:30/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:14:21
Pace5:40 /mi
2nd Half
Distance13.11 mi
Time1:18:25
Pace5:59 /mi
📊Positive Split: 5.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:04:4817:475:4317:47
5:43
-
10K
6.21 mi10:21:5234:515:3717:04
5:30
-0:13
15K
9.32 mi10:39:2152:205:3717:29
5:38
+0:08
20K
12.43 mi10:57:241:10:235:4018:03
5:49
+0:11
Half
13.11 mi11:01:221:14:215:403:58
5:49
0:00
25K
15.53 mi11:15:401:28:395:4214:18
5:54
+0:05
30K
18.64 mi11:34:261:47:255:4618:46
6:02
+0:08
20M
20.00 mi11:42:381:55:375:478:12
6:02
0:00
21M
21.00 mi11:48:582:01:575:486:20
6:20
+0:18
35K
21.75 mi11:53:202:06:195:484:22
5:50
-0:30
23M
23.00 mi12:01:042:14:035:507:44
6:11
+0:21
24M
24.00 mi12:06:532:19:525:505:49
5:49
-0:22
40K
24.85 mi12:12:032:25:025:505:10
6:03
+0:14
25.2M
25.20 mi12:14:112:27:105:502:08
6:11
+0:08
Finish
26.22 mi12:19:472:32:465:505:36
5:30
-0:41

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

5:30 /mi

Average Pace

5:50 /mi

Slowest Pace

6:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:34

89% of race

Time at Steady Pace

16:12

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 5:50 /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 mi10:04:4817:475:4317:47
5:43
#286
10K
6.21 mi10:21:5234:515:3717:04
5:30
#204
15K
9.32 mi10:39:2152:205:3717:29
5:38
#198
20K
12.43 mi10:57:241:10:235:4018:03
5:49
#216
Half
13.11 mi11:01:221:14:215:403:58
5:49
#225
25K
15.53 mi11:15:401:28:395:4214:18
5:54
#246
30K
18.64 mi11:34:261:47:255:4618:46
6:02
#272
20M
20.00 mi11:42:381:55:375:478:12
6:02
#273
21M
21.00 mi11:48:582:01:575:486:20
6:20
#270
35K
21.75 mi11:53:202:06:195:484:22
5:50
#271
23M
23.00 mi12:01:042:14:035:507:44
6:11
#274
24M
24.00 mi12:06:532:19:525:505:49
5:49
#264
40K
24.85 mi12:12:032:25:025:505:10
6:03
#254
25.2M
25.20 mi12:14:112:27:105:502:08
6:11
#246
Finish
26.22 mi12:19:472:32:465:505:36
5:30
#232
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi28622170(Top 0.6%)27(Top 0.2%)27(Top 0.6%)
10K6.21 mi3.10 mi204+8224-2224-22149(Top 0.6%)26(Top 0.2%)26(Top 0.5%)
15K9.32 mi3.11 mi198+627-327-3170(Top 0.6%)27(Top 0.2%)27(Top 0.6%)
20K12.43 mi3.11 mi216-182727321(Top 1%)32(Top 0.3%)32(Top 0.7%)
Half13.11 mi0.68 mi225-92727424(Top 2%)32(Top 0.3%)32(Top 0.7%)
25K15.53 mi2.42 mi246-2128-128-1389(Top 1%)29(Top 0.3%)29(Top 0.6%)
30K18.64 mi3.11 mi272-2629-129-1424(Top 2%)32(Top 0.3%)32(Top 0.7%)
20M20.00 mi1.36 mi273-128+128+1390(Top 1%)31(Top 0.3%)31(Top 0.6%)
21M21.00 mi1.00 mi270+327+127+1395(Top 1%)31(Top 0.3%)31(Top 0.6%)
35K21.75 mi0.75 mi271-12727430(Top 2%)32(Top 0.3%)32(Top 0.7%)
23M23.00 mi1.25 mi274-328-128-1589(Top 2%)34(Top 0.3%)34(Top 0.7%)
24M24.00 mi1.00 mi264+1027+127+1290(Top 1%)26(Top 0.2%)26(Top 0.5%)
40K24.85 mi0.85 mi254+102727405(Top 2%)26(Top 0.2%)26(Top 0.5%)
25.2M25.20 mi0.35 mi246+826+126+1165(Top 0.6%)19(Top 0.2%)19(Top 0.4%)
Finish26.22 mi1.02 mi232+142626100(Top 0.4%)12(Top 0.1%)12(Top 0.2%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 0.6%
×21stories
+97ft-345ft

Overall

170

Females

27

F18-39

27

5K→10K

3.1 - 6.2 mi

Top 0.6%
×5stories
+79ft-138ft

Overall

149

Females

26

F18-39

26

10K→15K

6.2 - 9.3 mi

Top 0.6%
×3stories
+67ft-78ft

Overall

170

Females

27

F18-39

27

15K→20K

9.3 - 12.4 mi

Top 1%
×5stories
+106ft-86ft

Overall

321

Females

32

F18-39

32

20K→Half

12.4 - 13.1 mi

Top 2%
×2stories
+19ft-37ft

Overall

424

Females

32

F18-39

32

Half→25K

13.1 - 15.5 mi

Top 1%
×4stories
+66ft-88ft

Overall

389

Females

29

F18-39

29

25K→30K

15.5 - 18.6 mi

Top 2%
×9stories
+181ft-148ft

Overall

424

Females

32

F18-39

32

30K→20M

18.6 - 20.0 mi

Top 1%
×5stories
+64ft-50ft

Overall

390

Females

31

F18-39

31

20M→21M

20.0 - 21.0 mi

Top 1%
×8stories
+106ft-24ft

Overall

395

Females

31

F18-39

31

21M→35K

21.0 - 21.8 mi

Top 2%
×7stories
+17ft-86ft

Overall

430

Females

32

F18-39

32

35K→23M

21.8 - 23.0 mi

Top 2%
×5stories
+23ft-63ft

Overall

589

Females

34

F18-39

34

23M→24M

23.0 - 24.0 mi

Top 1%
×6stories
+12ft-82ft

Overall

290

Females

26

F18-39

26

24M→40K

24.0 - 24.9 mi

Top 2%
×1story
+6ft-20ft

Overall

405

Females

26

F18-39

26

40K→25.2M

24.9 - 25.2 mi

Top 0.6%
×1story
+13ft-16ft

Overall

165

Females

19

F18-39

19

25.2M→Finish

25.2 - 26.2 mi

Top 0.4%
×2stories
+22ft-21ft

Overall

100

Females

12

F18-39

12

Passing Analysis

Category:
Athletes Passed
199
Passed By
145
Net Change
+54
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#286
5K → 10K10523+82#286#204
10K → 15K104+6#204#198
15K → 20K321-18#198#216
20K → Half211-9#216#225
Half → 25K122-21#225#246
25K → 30K935-26#246#272
30K → 20M56-1#272#273
20M → 21M74+3#273#270
21M → 35K45-1#270#271
35K → 23M69-3#271#274
23M → 24M133+10#274#264
24M → 40K122+10#264#254
40K → 25.2M80+8#254#246
25.2M → Finish140+14#246#232
TOTALS199145+54
📊

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