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BOSTON MARATHON 2023

Heather Siler

Bib: 17419•F

CO

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 49%
Gender (Female)
#0 / 11423
Top 33%
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:55/mi
24:35
↑ 97↓ 3451.5%
10K· 6.21 mi
7:55/mi
49:10
↑ 79↓ 1380.4%
15K· 9.32 mi
7:58/mi
1:13:56
↑ 67↓ 78
20K· 12.43 mi
8:04/mi
1:39:01
↑ 106↓ 860.1%
Half· 13.11 mi
7:52/mi
1:44:23
↑ 19↓ 370.5%
25K· 15.53 mi
8:04/mi
2:03:56
↑ 66↓ 880.2%
30K· 18.64 mi
8:15/mi
2:29:33
↑ 181↓ 1480.2%
20M
8:22/mi
2:40:55
↑ 64↓ 500.2%
21M
8:49/mi
2:49:44
↑ 106↓ 241.6%
35K· 21.75 mi
8:01/mi
2:55:44
↑ 17↓ 861.7%
23M
8:26/mi
3:06:17
↑ 23↓ 630.6%
24M
8:11/mi
3:14:28
↓ 821.3%
40K· 24.85 mi
8:17/mi
3:21:33
↓ 200.3%
25.2M
8:56/mi
3:24:38
↑ 13↓ 160.2%
Finish· 26.22 mi
8:10/mi
3:32:57
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:23
Pace7:58 /mi
2nd Half
Distance13.11 mi
Time1:48:34
Pace8:17 /mi
📊Positive Split: 4.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:4424:357:5524:35
7:55
-
10K
6.21 mi11:44:1949:107:5524:35
7:55
0:00
15K
9.32 mi12:09:051:13:567:5624:46
7:58
+0:03
20K
12.43 mi12:34:101:39:017:5825:05
8:04
+0:06
Half
13.11 mi12:39:321:44:237:585:22
7:52
-0:12
25K
15.53 mi12:59:052:03:567:5919:33
8:04
+0:12
30K
18.64 mi13:24:422:29:338:0125:37
8:15
+0:11
20M
20.00 mi13:36:042:40:558:0311:22
8:22
+0:07
21M
21.00 mi13:44:532:49:448:058:49
8:49
+0:27
35K
21.75 mi13:50:532:55:448:056:00
8:01
-0:48
23M
23.00 mi14:01:263:06:178:0610:33
8:26
+0:25
24M
24.00 mi14:09:373:14:288:068:11
8:11
-0:15
40K
24.85 mi14:16:423:21:338:077:05
8:17
+0:06
25.2M
25.20 mi14:19:473:24:388:073:05
8:56
+0:39
Finish
26.22 mi14:28:063:32:578:088:19
8:10
-0:46

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

7:52 /mi

Average Pace

8:08 /mi

Slowest Pace

8:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:21:03

94% of race

Time at Steady Pace

11:54

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:07 /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 mi11:19:4424:357:5524:35
7:55
#13368
10K
6.21 mi11:44:1949:107:5524:35
7:55
#13690
15K
9.32 mi12:09:051:13:567:5624:46
7:58
#13843
20K
12.43 mi12:34:101:39:017:5825:05
8:04
#13846
Half
13.11 mi12:39:321:44:237:585:22
7:52
#13806
25K
15.53 mi12:59:052:03:567:5919:33
8:04
#13701
30K
18.64 mi13:24:422:29:338:0125:37
8:15
#13462
20M
20.00 mi13:36:042:40:558:0311:22
8:22
#13387
21M
21.00 mi13:44:532:49:448:058:49
8:49
#13322
35K
21.75 mi13:50:532:55:448:056:00
8:01
#13260
23M
23.00 mi14:01:263:06:178:0610:33
8:26
#13190
24M
24.00 mi14:09:373:14:288:068:11
8:11
#13142
40K
24.85 mi14:16:423:21:338:077:05
8:17
#13071
25.2M
25.20 mi14:19:473:24:388:073:05
8:56
#13050
Finish
26.22 mi14:28:063:32:578:088:19
8:10
#13044
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 mi133683653365314162(Top 53%)4179(Top 37%)4179(Top 86%)
10K6.21 mi3.10 mi13690-3223860-2073860-20714087(Top 53%)4101(Top 36%)4101(Top 84%)
15K9.32 mi3.11 mi13843-1533962-1023962-10214162(Top 53%)4179(Top 37%)4179(Top 86%)
20K12.43 mi3.11 mi13846-33989-273989-2714054(Top 53%)4136(Top 36%)4136(Top 85%)
Half13.11 mi0.68 mi13806+403965+243965+2413375(Top 50%)3724(Top 33%)3724(Top 76%)
25K15.53 mi2.42 mi13701+1053928+373928+3713265(Top 50%)3786(Top 33%)3786(Top 78%)
30K18.64 mi3.11 mi13462+2393819+1093819+10912656(Top 48%)3560(Top 31%)3560(Top 73%)
20M20.00 mi1.36 mi13387+753791+283791+2812803(Top 48%)3744(Top 33%)3744(Top 77%)
21M21.00 mi1.00 mi13322+653764+273764+2712387(Top 47%)3623(Top 32%)3623(Top 74%)
35K21.75 mi0.75 mi13260+623748+163748+1612322(Top 46%)3613(Top 32%)3613(Top 74%)
23M23.00 mi1.25 mi13190+703729+193729+1912772(Top 48%)3951(Top 35%)3951(Top 81%)
24M24.00 mi1.00 mi13142+483735-63735-612506(Top 47%)3861(Top 34%)3861(Top 79%)
40K24.85 mi0.85 mi13071+713716+193716+1911954(Top 45%)3644(Top 32%)3644(Top 75%)
25.2M25.20 mi0.35 mi13050+213716371612230(Top 46%)3843(Top 34%)3843(Top 79%)
Finish26.22 mi1.02 mi13044+63725-93725-913196(Top 50%)4305(Top 38%)4305(Top 88%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21story building
+97ft-345ft

Overall

14162

Females

4179

F18-39

4179

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

14087

Females

4101

F18-39

4101

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+67ft-78ft

Overall

14162

Females

4179

F18-39

4179

15K→20K

9.3 - 12.4 mi

Top 53%
×5story building
+106ft-86ft

Overall

14054

Females

4136

F18-39

4136

20K→Half

12.4 - 13.1 mi

Top 50%
×2story building
+19ft-37ft

Overall

13375

Females

3724

F18-39

3724

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

13265

Females

3786

F18-39

3786

25K→30K

15.5 - 18.6 mi

Top 48%
×9story building
+181ft-148ft

Overall

12656

Females

3560

F18-39

3560

30K→20M

18.6 - 20.0 mi

Top 48%
×5story building
+64ft-50ft

Overall

12803

Females

3744

F18-39

3744

20M→21M

20.0 - 21.0 mi

Top 47%
×8story building
+106ft-24ft

Overall

12387

Females

3623

F18-39

3623

21M→35K

21.0 - 21.8 mi

Top 46%
×7story building
+17ft-86ft

Overall

12322

Females

3613

F18-39

3613

35K→23M

21.8 - 23.0 mi

Top 48%
×5story building
+23ft-63ft

Overall

12772

Females

3951

F18-39

3951

23M→24M

23.0 - 24.0 mi

Top 47%
×6story building
+12ft-82ft

Overall

12506

Females

3861

F18-39

3861

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

11954

Females

3644

F18-39

3644

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

12230

Females

3843

F18-39

3843

25.2M→Finish

25.2 - 26.2 mi

Top 50%
×2story building
+22ft-21ft

Overall

13196

Females

4305

F18-39

4305

Passing Analysis

Category:
Athletes Passed
1756
Passed By
1432
Net Change
+324
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13368
5K → 10K169491-322#13368#13690
10K → 15K114267-153#13690#13843
15K → 20K180183-3#13843#13846
20K → Half5818+40#13846#13806
Half → 25K18782+105#13806#13701
25K → 30K31374+239#13701#13462
30K → 20M11742+75#13462#13387
20M → 21M11853+65#13387#13322
21M → 35K8725+62#13322#13260
35K → 23M12353+70#13260#13190
23M → 24M9850+48#13190#13142
24M → 40K9019+71#13142#13071
40K → 25.2M3514+21#13071#13050
25.2M → Finish6761+6#13050#13044
TOTALS17561432+324
📊

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