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BOSTON MARATHON 2023

Na Li

CA

Bib: 16521 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 32%
Gender (Female)
#0 / 11423
Top 13%
Masters (Masters Women)
#0 / 6539
Top 5%
Division (F40-44)
#0 / 1878
Top 11%
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
7:14/mi
22:29
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:15/mi
44:59
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:21/mi
1:07:50
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:30/mi
1:31:09
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:31/mi
1:36:17
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:38/mi
1:54:47
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:54/mi
2:19:20
↑ 181↓ 1480.2%
138 ft elev
20M
7:58/mi
2:30:09
↑ 64↓ 500.2%
148 ft elev
21M
8:33/mi
2:38:42
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:33/mi
2:44:21
↑ 17↓ 861.7%
156 ft elev
23M
7:45/mi
2:54:03
↑ 23↓ 630.6%
116 ft elev
24M
7:16/mi
3:01:19
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:26/mi
3:07:40
↓ 200.3%
20 ft elev
25.2M
8:10/mi
3:10:29
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:27/mi
3:18:05
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:17
Pace7:21 /mi
2nd Half
Distance13.11 mi
Time1:41:48
Pace7:46 /mi
📊Positive Split: 5.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:12:3822:297:1422:29
7:14
-
10K
6.21 mi11:35:0844:597:1422:30
7:15
+0:01
15K
9.32 mi11:57:591:07:507:1722:51
7:21
+0:06
20K
12.43 mi12:21:181:31:097:2023:19
7:30
+0:09
Half
13.11 mi12:26:261:36:177:215:08
7:31
+0:01
25K
15.53 mi12:44:561:54:477:2318:30
7:38
+0:07
30K
18.64 mi13:09:292:19:207:2824:33
7:54
+0:16
20M
20.00 mi13:20:182:30:097:3010:49
7:58
+0:04
21M
21.00 mi13:28:512:38:427:338:33
8:33
+0:35
35K
21.75 mi13:34:302:44:217:335:39
7:33
-1:00
23M
23.00 mi13:44:122:54:037:349:42
7:45
+0:12
24M
24.00 mi13:51:283:01:197:337:16
7:16
-0:29
40K
24.85 mi13:57:493:07:407:336:21
7:26
+0:10
25.2M
25.20 mi14:00:383:10:297:342:49
8:10
+0:44
Finish
26.22 mi14:08:143:18:057:347:36
7:27
-0:43

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

7:14 /mi

Average Pace

7:34 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:55:54

89% of race

Time at Steady Pace

13:38

7% of race

Time at Slower Pace

8:33

4% of race

Average Pace: 7:33 /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 mi11:12:3822:297:1422:29
7:14
#7735
10K
6.21 mi11:35:0844:597:1422:30
7:15
#8035
15K
9.32 mi11:57:591:07:507:1722:51
7:21
#8298
20K
12.43 mi12:21:181:31:097:2023:19
7:30
#8511
Half
13.11 mi12:26:261:36:177:215:08
7:31
#8600
25K
15.53 mi12:44:561:54:477:2318:30
7:38
#8754
30K
18.64 mi13:09:292:19:207:2824:33
7:54
#8967
20M
20.00 mi13:20:182:30:097:3010:49
7:58
#9010
21M
21.00 mi13:28:512:38:427:338:33
8:33
#9086
35K
21.75 mi13:34:302:44:217:335:39
7:33
#9068
23M
23.00 mi13:44:122:54:037:349:42
7:45
#8979
24M
24.00 mi13:51:283:01:197:337:16
7:16
#8818
40K
24.85 mi13:57:493:07:407:336:21
7:26
#8702
25.2M
25.20 mi14:00:383:10:297:342:49
8:10
#8682
Finish
26.22 mi14:08:143:18:057:347:36
7:27
#8632
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi7735923923898914441444
10K6.21 mi3.10 mi8035-3001045-1221045-122843412071207
15K9.32 mi3.11 mi8298-2631146-1011146-101898914441444
20K12.43 mi3.11 mi8511-2131241-951241-95935616231623
Half13.11 mi0.68 mi8600-891273-321273-321043020852085
25K15.53 mi2.42 mi8754-1541356-831356-83978419031903
30K18.64 mi3.11 mi8967-2131470-1141470-1141016122332233
20M20.00 mi1.36 mi9010-431509-391509-39997522062206
21M21.00 mi1.00 mi9086-761569-601569-601076827472747
35K21.75 mi0.75 mi9068+1815691569894518821882
23M23.00 mi1.25 mi8979+891561+81561+8806616101610
24M24.00 mi1.00 mi8818+1611525+361525+366194986986
40K24.85 mi0.85 mi8702+1161496+291496+29628810841084
25.2M25.20 mi0.35 mi8682+201495+11495+1755516251625
Finish26.22 mi1.02 mi8632+5014951495826019351935

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21story building
+97ft-345ft

Overall

8989

Females

1444

F40-44

1444

5K→10K

3.1 - 6.2 mi

Top 32%
×5story building
+79ft-138ft

Overall

8434

Females

1207

F40-44

1207

10K→15K

6.2 - 9.3 mi

Top 34%
×3story building
+67ft-78ft

Overall

8989

Females

1444

F40-44

1444

15K→20K

9.3 - 12.4 mi

Top 35%
×5story building
+106ft-86ft

Overall

9356

Females

1623

F40-44

1623

20K→Half

12.4 - 13.1 mi

Top 39%
×2story building
+19ft-37ft

Overall

10430

Females

2085

F40-44

2085

Half→25K

13.1 - 15.5 mi

Top 37%
×4story building
+66ft-88ft

Overall

9784

Females

1903

F40-44

1903

25K→30K

15.5 - 18.6 mi

Top 38%
×9story building
+181ft-148ft

Overall

10161

Females

2233

F40-44

2233

30K→20M

18.6 - 20.0 mi

Top 37%
×5story building
+64ft-50ft

Overall

9975

Females

2206

F40-44

2206

20M→21M

20.0 - 21.0 mi

Top 40%
×8story building
+106ft-24ft

Overall

10768

Females

2747

F40-44

2747

21M→35K

21.0 - 21.8 mi

Top 34%
×7story building
+17ft-86ft

Overall

8945

Females

1882

F40-44

1882

35K→23M

21.8 - 23.0 mi

Top 30%
×5story building
+23ft-63ft

Overall

8066

Females

1610

F40-44

1610

23M→24M

23.0 - 24.0 mi

Top 23%
×6story building
+12ft-82ft

Overall

6194

Females

986

F40-44

986

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6288

Females

1084

F40-44

1084

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

7555

Females

1625

F40-44

1625

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8260

Females

1935

F40-44

1935

Passing Analysis

Category:
Athletes Passed
1115
Passed By
2012
Net Change
-897
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7735
5K → 10K104404-300#7735#8035
10K → 15K67330-263#8035#8298
15K → 20K71284-213#8298#8511
20K → Half493-89#8511#8600
Half → 25K56210-154#8600#8754
25K → 30K107320-213#8754#8967
30K → 20M68111-43#8967#9010
20M → 21M55131-76#9010#9086
21M → 35K5234+18#9086#9068
35K → 23M11930+89#9068#8979
23M → 24M1654+161#8979#8818
24M → 40K12913+116#8818#8702
40K → 25.2M3313+20#8702#8682
25.2M → Finish8535+50#8682#8632
TOTALS11152012-897

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