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BOSTON MARATHON 2023

Brooke Koblitz

Bib: 7028•F

TN

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 8%
Gender (Female)
#0 / 11423
Top 0.8%
Division (F18-39)
#0 / 4884
Top 2%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:53
Rank: #3885
Start → 5K
20:53 | 6:43/mi
10K· 6.21 mi
41:22
Rank: #3597 (+288)
5K → 10K
20:29 | 6:36/mi
15K· 9.32 mi
1:01:34
Rank: #3238 (+359)
10K → 15K
20:12 | 6:30/mi
20K· 12.43 mi
1:21:47
Rank: #2942 (+296)
15K → 20K
20:13 | 6:30/mi
Half· 13.11 mi
1:26:07
Rank: #2879 (+63)
20K → Half
4:20 | 6:21/mi
25K· 15.53 mi
1:41:44
Rank: #2676 (+203)
Half → 25K
15:37 | 6:26/mi
30K· 18.64 mi
2:01:52
Rank: #2413 (+263)
25K → 30K
20:08 | 6:29/mi
20M
2:10:45
Rank: #2331 (+82)
30K → 20M
8:53 | 6:32/mi
21M
2:17:40
Rank: #2279 (+52)
20M → 21M
6:55 | 6:55/mi
35K· 21.75 mi
2:22:31
Rank: #2265 (+14)
21M → 35K
4:51 | 6:29/mi
23M
2:30:56
Rank: #2238 (+27)
35K → 23M
8:25 | 6:43/mi
24M
2:37:30
Rank: #2226 (+12)
23M → 24M
6:34 | 6:34/mi
40K· 24.85 mi
2:43:11
Rank: #2205 (+21)
24M → 40K
5:41 | 6:39/mi
25.2M
2:45:40
Rank: #2194 (+11)
40K → 25.2M
2:29 | 7:12/mi
Finish· 26.22 mi
2:52:24
Rank: #2182 (+12)
25.2M → Finish
6:44 | 6:36/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:26:07
Pace6:34 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:26:17
Pace6:35 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:5920:536:4320:53
6:43
-
10K
6.21 mi10:45:2841:226:3920:29
6:36
-0:07
15K
9.32 mi11:05:401:01:346:3620:12
6:30
-0:06
20K
12.43 mi11:25:531:21:476:3520:13
6:30
0:00
Half
13.11 mi11:30:131:26:076:344:20
6:21
-0:09
25K
15.53 mi11:45:501:41:446:3315:37
6:26
+0:05
30K
18.64 mi12:05:582:01:526:3220:08
6:29
+0:03
20M
20.00 mi12:14:512:10:456:328:53
6:32
+0:03
21M
21.00 mi12:21:462:17:406:336:55
6:55
+0:23
35K
21.75 mi12:26:372:22:316:334:51
6:29
-0:26
23M
23.00 mi12:35:022:30:566:348:25
6:43
+0:14
24M
24.00 mi12:41:362:37:306:346:34
6:34
-0:09
40K
24.85 mi12:47:172:43:116:345:41
6:39
+0:05
25.2M
25.20 mi12:49:462:45:406:342:29
7:12
+0:33
Finish
26.22 mi12:56:302:52:246:356:44
6:36
-0:36

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

6:21 /mi

Average Pace

6:35 /mi

Slowest Pace

7:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:49:55

99% of race

Time at Steady Pace

2:29

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:35 /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 mi10:24:5920:536:4320:53
6:43
#3885
10K
6.21 mi10:45:2841:226:3920:29
6:36
#3597
15K
9.32 mi11:05:401:01:346:3620:12
6:30
#3238
20K
12.43 mi11:25:531:21:476:3520:13
6:30
#2942
Half
13.11 mi11:30:131:26:076:344:20
6:21
#2879
25K
15.53 mi11:45:501:41:446:3315:37
6:26
#2676
30K
18.64 mi12:05:582:01:526:3220:08
6:29
#2413
20M
20.00 mi12:14:512:10:456:328:53
6:32
#2331
21M
21.00 mi12:21:462:17:406:336:55
6:55
#2279
35K
21.75 mi12:26:372:22:316:334:51
6:29
#2265
23M
23.00 mi12:35:022:30:566:348:25
6:43
#2238
24M
24.00 mi12:41:362:37:306:346:34
6:34
#2226
40K
24.85 mi12:47:172:43:116:345:41
6:39
#2205
25.2M
25.20 mi12:49:462:45:406:342:29
7:12
#2194
Finish
26.22 mi12:56:302:52:246:356:44
6:36
#2182
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi38852302302658(Top 10%)115(Top 1%)115(Top 2%)
10K6.21 mi3.10 mi3597+288199+31199+313462(Top 13%)175(Top 2%)175(Top 4%)
15K9.32 mi3.11 mi3238+359155+44155+442658(Top 10%)115(Top 1%)115(Top 2%)
20K12.43 mi3.11 mi2942+296128+27128+272338(Top 9%)96(Top 0.8%)96(Top 2%)
Half13.11 mi0.68 mi2879+631281282045(Top 8%)79(Top 0.7%)79(Top 2%)
25K15.53 mi2.42 mi2676+203117+11117+111927(Top 7%)80(Top 0.7%)80(Top 2%)
30K18.64 mi3.11 mi2413+26399+1899+181505(Top 6%)64(Top 0.6%)64(Top 1%)
20M20.00 mi1.36 mi2331+8293+693+61615(Top 6%)74(Top 0.6%)74(Top 2%)
21M21.00 mi1.00 mi2279+5294-194-11850(Top 7%)88(Top 0.8%)88(Top 2%)
35K21.75 mi0.75 mi2265+1494942376(Top 9%)122(Top 1%)122(Top 2%)
23M23.00 mi1.25 mi2238+2792+292+22292(Top 9%)130(Top 1%)130(Top 3%)
24M24.00 mi1.00 mi2226+1289+389+32424(Top 9%)156(Top 1%)156(Top 3%)
40K24.85 mi0.85 mi2205+2187+287+22137(Top 8%)137(Top 1%)137(Top 3%)
25.2M25.20 mi0.35 mi2194+1187872595(Top 10%)187(Top 2%)187(Top 4%)
Finish26.22 mi1.02 mi2182+1289-289-23043(Top 11%)290(Top 3%)290(Top 6%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2658

Females

115

F18-39

115

5K→10K

3.1 - 6.2 mi

Top 13%
×5stories
+79ft-138ft

Overall

3462

Females

175

F18-39

175

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2658

Females

115

F18-39

115

15K→20K

9.3 - 12.4 mi

Top 9%
×5stories
+106ft-86ft

Overall

2338

Females

96

F18-39

96

20K→Half

12.4 - 13.1 mi

Top 8%
×2stories
+19ft-37ft

Overall

2045

Females

79

F18-39

79

Half→25K

13.1 - 15.5 mi

Top 7%
×4stories
+66ft-88ft

Overall

1927

Females

80

F18-39

80

25K→30K

15.5 - 18.6 mi

Top 6%
×9stories
+181ft-148ft

Overall

1505

Females

64

F18-39

64

30K→20M

18.6 - 20.0 mi

Top 6%
×5stories
+64ft-50ft

Overall

1615

Females

74

F18-39

74

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

1850

Females

88

F18-39

88

21M→35K

21.0 - 21.8 mi

Top 9%
×7stories
+17ft-86ft

Overall

2376

Females

122

F18-39

122

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2292

Females

130

F18-39

130

23M→24M

23.0 - 24.0 mi

Top 9%
×6stories
+12ft-82ft

Overall

2424

Females

156

F18-39

156

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2137

Females

137

F18-39

137

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2595

Females

187

F18-39

187

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2stories
+22ft-21ft

Overall

3043

Females

290

F18-39

290

Passing Analysis

Category:
Athletes Passed
1937
Passed By
234
Net Change
+1703
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3885
5K → 10K388100+288#3885#3597
10K → 15K37112+359#3597#3238
15K → 20K2993+296#3238#2942
20K → Half641+63#2942#2879
Half → 25K2052+203#2879#2676
25K → 30K2663+263#2676#2413
30K → 20M875+82#2413#2331
20M → 21M608+52#2331#2279
21M → 35K2511+14#2279#2265
35K → 23M4316+27#2265#2238
23M → 24M3725+12#2238#2226
24M → 40K4120+21#2226#2205
40K → 25.2M165+11#2205#2194
25.2M → Finish3523+12#2194#2182
TOTALS1937234+1703
📊

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