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BOSTON MARATHON 2023

Kristin Lefler

BC

Bib: 18714 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 47%
Masters (Masters Women)
#0 / 6539
Top 36%
Division (F40-44)
#0 / 1878
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
8:28/mi
26:19
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:26/mi
52:30
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
9:02/mi
1:20:35
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:20/mi
1:46:28
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:12/mi
1:52:04
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:23/mi
2:12:23
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:32/mi
2:38:55
↑ 181↓ 1480.2%
138 ft elev
20M
8:38/mi
2:50:39
↑ 64↓ 500.2%
148 ft elev
21M
9:03/mi
2:59:42
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:31/mi
3:06:04
↑ 17↓ 861.7%
156 ft elev
23M
8:29/mi
3:16:41
↑ 23↓ 630.6%
116 ft elev
24M
8:10/mi
3:24:51
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:22/mi
3:32:00
↓ 200.3%
20 ft elev
25.2M
8:48/mi
3:35:02
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:06/mi
3:43:17
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:52:048:33 /mi⚖️ balanced
2nd Half
1:51:138:29 /mi⚖️ balanced
Even split — consistent pacing between halves
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Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:3426:198:2826:19
8:28
-
10K
6.21 mi11:43:4552:308:2726:11
8:26
-0:02
15K
9.32 mi12:11:501:20:358:3928:05
9:02
+0:36
20K
12.43 mi12:37:431:46:288:3425:53
8:20
-0:42
Half
13.11 mi12:43:191:52:048:335:36
8:12
-0:08
25K
15.53 mi13:03:382:12:238:3120:19
8:23
+0:11
30K
18.64 mi13:30:102:38:558:3226:32
8:32
+0:09
20M
20.00 mi13:41:542:50:398:3211:44
8:38
+0:06
21M
21.00 mi13:50:572:59:428:339:03
9:03
+0:25
35K
21.75 mi13:57:193:06:048:336:22
8:31
-0:32
23M
23.00 mi14:07:563:16:418:3310:37
8:29
-0:02
24M
24.00 mi14:16:063:24:518:328:10
8:10
-0:19
40K
24.85 mi14:23:153:32:008:327:09
8:22
+0:12
25.2M
25.20 mi14:26:173:35:028:323:02
8:48
+0:26
Finish
26.22 mi14:34:323:43:178:318:15
8:06
-0:42

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

8:06 /mi

Average Pace

8:31 /mi

Slowest Pace

9:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:06:09

83% of race

Time at Steady Pace

37:08

17% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:31 /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 mi11:17:3426:198:2826:19
8:28
#17368
10K
6.21 mi11:43:4552:308:2726:11
8:26
#17542
15K
9.32 mi12:11:501:20:358:3928:05
9:02
#18728
20K
12.43 mi12:37:431:46:288:3425:53
8:20
#18011
Half
13.11 mi12:43:191:52:048:335:36
8:12
#17882
25K
15.53 mi13:03:382:12:238:3120:19
8:23
#17468
30K
18.64 mi13:30:102:38:558:3226:32
8:32
#16924
20M
20.00 mi13:41:542:50:398:3211:44
8:38
#16732
21M
21.00 mi13:50:572:59:428:339:03
9:03
#16538
35K
21.75 mi13:57:193:06:048:336:22
8:31
#16481
23M
23.00 mi14:07:563:16:418:3310:37
8:29
#16281
24M
24.00 mi14:16:063:24:518:328:10
8:10
#16096
40K
24.85 mi14:23:153:32:008:327:09
8:22
#15955
25.2M
25.20 mi14:26:173:35:028:323:02
8:48
#15872
Finish
26.22 mi14:34:323:43:178:318:15
8:06
#15752
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi17368617361732067280488048
10K6.21 mi3.10 mi17542-1746248-756248-751777663536353
15K9.32 mi3.11 mi18728-11866957-7096957-7092067280488048
20K12.43 mi3.11 mi18011+7176523+4346523+4341581252345234
Half13.11 mi0.68 mi17882+1296453+706453+701591052425242
25K15.53 mi2.42 mi17468+4146219+2346219+2341546851235123
30K18.64 mi3.11 mi16924+5445918+3015918+3011456546694669
20M20.00 mi1.36 mi16732+1925828+905828+901451647184718
21M21.00 mi1.00 mi16538+1945730+985730+981372443484348
35K21.75 mi0.75 mi16481+575702+285702+281540753525352
23M23.00 mi1.25 mi16281+2005602+1005602+1001312141424142
24M24.00 mi1.00 mi16096+1855518+845518+841243438313831
40K24.85 mi0.85 mi15955+1415455+635455+631252539663966
25.2M25.20 mi0.35 mi15872+835410+455410+451144534573457
Finish26.22 mi1.02 mi15752+1205345+655345+651279341174117

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 78%
×21story building
+97ft-345ft

Overall

20672

Females

8048

F40-44

8048

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

17776

Females

6353

F40-44

6353

10K→15K

6.2 - 9.3 mi

Top 78%
×3story building
+67ft-78ft

Overall

20672

Females

8048

F40-44

8048

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

15812

Females

5234

F40-44

5234

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

15910

Females

5242

F40-44

5242

Half→25K

13.1 - 15.5 mi

Top 58%
×4story building
+66ft-88ft

Overall

15468

Females

5123

F40-44

5123

25K→30K

15.5 - 18.6 mi

Top 55%
×9story building
+181ft-148ft

Overall

14565

Females

4669

F40-44

4669

30K→20M

18.6 - 20.0 mi

Top 55%
×5story building
+64ft-50ft

Overall

14516

Females

4718

F40-44

4718

20M→21M

20.0 - 21.0 mi

Top 52%
×8story building
+106ft-24ft

Overall

13724

Females

4348

F40-44

4348

21M→35K

21.0 - 21.8 mi

Top 58%
×7story building
+17ft-86ft

Overall

15407

Females

5352

F40-44

5352

35K→23M

21.8 - 23.0 mi

Top 49%
×5story building
+23ft-63ft

Overall

13121

Females

4142

F40-44

4142

23M→24M

23.0 - 24.0 mi

Top 47%
×6story building
+12ft-82ft

Overall

12434

Females

3831

F40-44

3831

24M→40K

24.0 - 24.9 mi

Top 47%
×1story
+6ft-20ft

Overall

12525

Females

3966

F40-44

3966

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

11445

Females

3457

F40-44

3457

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2story building
+22ft-21ft

Overall

12793

Females

4117

F40-44

4117

Passing Analysis

Category:
Athletes Passed
3300
Passed By
1684
Net Change
+1616
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17368
5K → 10K218392-174#17368#17542
10K → 15K131199-1186#17542#18728
15K → 20K7269+717#18728#18011
20K → Half1312+129#18011#17882
Half → 25K4184+414#17882#17468
25K → 30K5517+544#17468#16924
30K → 20M2008+192#16924#16732
20M → 21M20410+194#16732#16538
21M → 35K7518+57#16538#16481
35K → 23M2088+200#16481#16281
23M → 24M1894+185#16281#16096
24M → 40K1509+141#16096#15955
40K → 25.2M852+83#15955#15872
25.2M → Finish13212+120#15872#15752
TOTALS33001684+1616

Passing Charts

Category:
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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