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BOSTON MARATHON 2023

Tammy Hsieh

Bib: 1534•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 5%
Gender (Female)
#0 / 11423
Top 0.6%
Division (F18-39)
#0 / 4884
Top 1%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:51
Rank: #1782
Start → 5K
6:23/mi
19:51 split
10K· 6.21 mi
40:03
Rank: #2218 (-436)
5K → 10K
6:30/mi
20:12 split
15K· 9.32 mi
1:00:15
Rank: #2352 (-134)
10K → 15K
6:30/mi
20:12 split
20K· 12.43 mi
1:20:41
Rank: #2402 (-50)
15K → 20K
6:35/mi
20:26 split
Half· 13.11 mi
1:25:10
Rank: #2450 (-48)
20K → Half
6:35/mi
4:29 split
25K· 15.53 mi
1:41:11
Rank: #2494 (-44)
Half → 25K
6:36/mi
16:01 split
30K· 18.64 mi
2:01:25
Rank: #2300 (+194)
25K → 30K
6:31/mi
20:14 split
20M
2:09:47
Rank: #2090 (+210)
30K → 20M
6:10/mi
8:22 split
21M
2:15:57
Rank: #1882 (+208)
20M → 21M
6:10/mi
6:10 split
35K· 21.75 mi
2:20:22
Rank: #1796 (+86)
21M → 35K
5:54/mi
4:25 split
23M
2:27:57
Rank: #1654 (+142)
35K → 23M
6:04/mi
7:35 split
24M
2:34:01
Rank: #1572 (+82)
23M → 24M
6:04/mi
6:04 split
40K· 24.85 mi
2:39:12
Rank: #1499 (+73)
24M → 40K
6:04/mi
5:11 split
25.2M
2:41:17
Rank: #1452 (+47)
40K → 25.2M
6:04/mi
2:05 split
Finish· 26.22 mi
2:47:17
Rank: #1373 (+79)
25.2M → Finish
5:53/mi
6:00 split

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:25:10
Pace6:30 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:22:07
Pace6:16 /mi
📊Negative Split: 3.6% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:1419:516:2319:51
6:23
-
10K
6.21 mi10:40:2640:036:2720:12
6:30
+0:07
15K
9.32 mi11:00:381:00:156:2820:12
6:30
0:00
20K
12.43 mi11:21:041:20:416:3020:26
6:35
+0:05
Half
13.11 mi11:25:331:25:106:304:29
6:35
0:00
25K
15.53 mi11:41:341:41:116:3116:01
6:36
+0:01
30K
18.64 mi12:01:482:01:256:3120:14
6:31
-0:05
20M
20.00 mi12:10:102:09:476:298:22
6:10
-0:21
21M
21.00 mi12:16:202:15:576:286:10
6:10
0:00
35K
21.75 mi12:20:452:20:226:274:25
5:54
-0:16
23M
23.00 mi12:28:202:27:576:267:35
6:04
+0:10
24M
24.00 mi12:34:242:34:016:256:04
6:04
0:00
40K
24.85 mi12:39:352:39:126:245:11
6:04
0:00
25.2M
25.20 mi12:41:402:41:176:242:05
6:04
0:00
Finish
26.22 mi12:47:402:47:176:236:00
5:53
-0:11

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

5:53 /mi

Average Pace

6:23 /mi

Slowest Pace

6:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:05:43

39% of race

Time at Steady Pace

1:41:34

61% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:23 /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 mi10:20:1419:516:2319:51
6:23
#1782
10K
6.21 mi10:40:2640:036:2720:12
6:30
#2218
15K
9.32 mi11:00:381:00:156:2820:12
6:30
#2352
20K
12.43 mi11:21:041:20:416:3020:26
6:35
#2402
Half
13.11 mi11:25:331:25:106:304:29
6:35
#2450
25K
15.53 mi11:41:341:41:116:3116:01
6:36
#2494
30K
18.64 mi12:01:482:01:256:3120:14
6:31
#2300
20M
20.00 mi12:10:102:09:476:298:22
6:10
#2090
21M
21.00 mi12:16:202:15:576:286:10
6:10
#1882
35K
21.75 mi12:20:452:20:226:274:25
5:54
#1796
23M
23.00 mi12:28:202:27:576:267:35
6:04
#1654
24M
24.00 mi12:34:242:34:016:256:04
6:04
#1572
40K
24.85 mi12:39:352:39:126:245:11
6:04
#1499
25.2M
25.20 mi12:41:402:41:176:242:05
6:04
#1452
Finish
26.22 mi12:47:402:47:176:236:00
5:53
#1373
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi178282822657(Top 10%)114(Top 1.0%)114(Top 2%)
10K6.21 mi3.10 mi2218-43695-1395-132814(Top 11%)122(Top 1%)122(Top 2%)
15K9.32 mi3.11 mi2352-13498-398-32657(Top 10%)114(Top 1.0%)114(Top 2%)
20K12.43 mi3.11 mi2402-5099-199-12683(Top 10%)116(Top 1%)116(Top 2%)
Half13.11 mi0.68 mi2450-48100-1100-13318(Top 12%)167(Top 1%)167(Top 3%)
25K15.53 mi2.42 mi2494-44104-4104-42759(Top 10%)118(Top 1%)118(Top 2%)
30K18.64 mi3.11 mi2300+19491+1391+131616(Top 6%)69(Top 0.6%)69(Top 1%)
20M20.00 mi1.36 mi2090+21085+685+6590(Top 2%)35(Top 0.3%)35(Top 0.7%)
21M21.00 mi1.00 mi1882+20879+679+6200(Top 0.8%)23(Top 0.2%)23(Top 0.5%)
35K21.75 mi0.75 mi1796+8677+277+2533(Top 2%)38(Top 0.3%)38(Top 0.8%)
23M23.00 mi1.25 mi1654+14272+572+5393(Top 1%)28(Top 0.2%)28(Top 0.6%)
24M24.00 mi1.00 mi1572+8269+369+3670(Top 3%)37(Top 0.3%)37(Top 0.8%)
40K24.85 mi0.85 mi1499+7368+168+1408(Top 2%)27(Top 0.2%)27(Top 0.6%)
25.2M25.20 mi0.35 mi1452+4766+266+2101(Top 0.4%)14(Top 0.1%)14(Top 0.3%)
Finish26.22 mi1.02 mi1373+7965+165+1517(Top 2%)25(Top 0.2%)25(Top 0.5%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21story building
+97ft-345ft

Overall

2657

Females

114

F18-39

114

5K→10K

3.1 - 6.2 mi

Top 11%
×5story building
+79ft-138ft

Overall

2814

Females

122

F18-39

122

10K→15K

6.2 - 9.3 mi

Top 10%
×3story building
+67ft-78ft

Overall

2657

Females

114

F18-39

114

15K→20K

9.3 - 12.4 mi

Top 10%
×5story building
+106ft-86ft

Overall

2683

Females

116

F18-39

116

20K→Half

12.4 - 13.1 mi

Top 12%
×2story building
+19ft-37ft

Overall

3318

Females

167

F18-39

167

Half→25K

13.1 - 15.5 mi

Top 10%
×4story building
+66ft-88ft

Overall

2759

Females

118

F18-39

118

25K→30K

15.5 - 18.6 mi

Top 6%
×9story building
+181ft-148ft

Overall

1616

Females

69

F18-39

69

30K→20M

18.6 - 20.0 mi

Top 2%
×5story building
+64ft-50ft

Overall

590

Females

35

F18-39

35

20M→21M

20.0 - 21.0 mi

Top 0.8%
×8story building
+106ft-24ft

Overall

200

Females

23

F18-39

23

21M→35K

21.0 - 21.8 mi

Top 2%
×7story building
+17ft-86ft

Overall

533

Females

38

F18-39

38

35K→23M

21.8 - 23.0 mi

Top 1%
×5story building
+23ft-63ft

Overall

393

Females

28

F18-39

28

23M→24M

23.0 - 24.0 mi

Top 3%
×6story building
+12ft-82ft

Overall

670

Females

37

F18-39

37

24M→40K

24.0 - 24.9 mi

Top 2%
×1story
+6ft-20ft

Overall

408

Females

27

F18-39

27

40K→25.2M

24.9 - 25.2 mi

Top 0.4%
×1story
+13ft-16ft

Overall

101

Females

14

F18-39

14

25.2M→Finish

25.2 - 26.2 mi

Top 2%
×2story building
+22ft-21ft

Overall

517

Females

25

F18-39

25

Passing Analysis

Category:
Athletes Passed
1260
Passed By
851
Net Change
+409
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1782
5K → 10K10446-436#1782#2218
10K → 15K37171-134#2218#2352
15K → 20K4595-50#2352#2402
20K → Half149-48#2402#2450
Half → 25K3680-44#2450#2494
25K → 30K1984+194#2494#2300
30K → 20M2100+210#2300#2090
20M → 21M2080+208#2090#1882
21M → 35K860+86#1882#1796
35K → 23M1420+142#1796#1654
23M → 24M853+82#1654#1572
24M → 40K752+73#1572#1499
40K → 25.2M470+47#1499#1452
25.2M → Finish801+79#1452#1373
TOTALS1260851+409
📊

Passing Visuals

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