Boston Marathon logo
BOSTON MARATHON 2023

Colleen Bach

Bib: 17058•F

IN

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 38%
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:41
Rank: #13629
Start → 5K
24:41 | 7:57/mi
10K· 6.21 mi
48:58
Rank: #13427 (+202)
5K → 10K
24:17 | 7:49/mi
15K· 9.32 mi
1:13:24
Rank: #13379 (+48)
10K → 15K
24:26 | 7:52/mi
20K· 12.43 mi
1:38:26
Rank: #13480 (-101)
15K → 20K
25:02 | 8:03/mi
Half· 13.11 mi
1:43:52
Rank: #13507 (-27)
20K → Half
5:26 | 7:58/mi
25K· 15.53 mi
2:03:58
Rank: #13719 (-212)
Half → 25K
20:06 | 8:17/mi
30K· 18.64 mi
2:30:36
Rank: #13939 (-220)
25K → 30K
26:38 | 8:34/mi
20M
2:42:24
Rank: #14006 (-67)
30K → 20M
11:48 | 8:41/mi
21M
2:51:30
Rank: #13961 (+45)
20M → 21M
9:06 | 9:06/mi
35K· 21.75 mi
2:57:50
Rank: #13994 (-33)
21M → 35K
6:20 | 8:28/mi
23M
3:08:55
Rank: #14049 (-55)
35K → 23M
11:05 | 8:51/mi
24M
3:17:26
Rank: #14072 (-23)
23M → 24M
8:31 | 8:31/mi
40K· 24.85 mi
3:24:52
Rank: #14076 (-4)
24M → 40K
7:26 | 8:42/mi
25.2M
3:28:04
Rank: #14069 (+7)
40K → 25.2M
3:12 | 9:17/mi
Finish· 26.22 mi
3:36:15
Rank: #13989 (+80)
25.2M → Finish
8:11 | 8:02/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:52
Pace7:55 /mi
2nd Half
Distance13.11 mi
Time1:52:23
Pace8:34 /mi
📊Positive Split: 8.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:2724:417:5724:41
7:57
-
10K
6.21 mi11:39:4448:587:5324:17
7:49
-0:08
15K
9.32 mi12:04:101:13:247:5324:26
7:52
+0:03
20K
12.43 mi12:29:121:38:267:5525:02
8:03
+0:11
Half
13.11 mi12:34:381:43:527:555:26
7:58
-0:05
25K
15.53 mi12:54:442:03:587:5920:06
8:17
+0:19
30K
18.64 mi13:21:222:30:368:0526:38
8:34
+0:17
20M
20.00 mi13:33:102:42:248:0711:48
8:41
+0:07
21M
21.00 mi13:42:162:51:308:109:06
9:06
+0:25
35K
21.75 mi13:48:362:57:508:116:20
8:28
-0:38
23M
23.00 mi13:59:413:08:558:1311:05
8:51
+0:23
24M
24.00 mi14:08:123:17:268:148:31
8:31
-0:20
40K
24.85 mi14:15:383:24:528:157:26
8:42
+0:11
25.2M
25.20 mi14:18:503:28:048:153:12
9:17
+0:35
Finish
26.22 mi14:27:013:36:158:158:11
8:02
-1:15

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

7:49 /mi

Average Pace

8:15 /mi

Slowest Pace

9:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:53:38

80% of race

Time at Steady Pace

39:25

18% of race

Time at Slower Pace

3:12

1% of race

Average Pace: 8:15 /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 mi11:15:2724:417:5724:41
7:57
#13629
10K
6.21 mi11:39:4448:587:5324:17
7:49
#13427
15K
9.32 mi12:04:101:13:247:5324:26
7:52
#13379
20K
12.43 mi12:29:121:38:267:5525:02
8:03
#13480
Half
13.11 mi12:34:381:43:527:555:26
7:58
#13507
25K
15.53 mi12:54:442:03:587:5920:06
8:17
#13719
30K
18.64 mi13:21:222:30:368:0526:38
8:34
#13939
20M
20.00 mi13:33:102:42:248:0711:48
8:41
#14006
21M
21.00 mi13:42:162:51:308:109:06
9:06
#13961
35K
21.75 mi13:48:362:57:508:116:20
8:28
#13994
23M
23.00 mi13:59:413:08:558:1311:05
8:51
#14049
24M
24.00 mi14:08:123:17:268:148:31
8:31
#14072
40K
24.85 mi14:15:383:24:528:157:26
8:42
#14076
25.2M
25.20 mi14:18:503:28:048:153:12
9:17
#14069
Finish
26.22 mi14:27:013:36:158:158:11
8:02
#13989
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi136293803380313241(Top 50%)3630(Top 32%)3630(Top 74%)
10K6.21 mi3.10 mi13427+2023694+1093694+10913284(Top 50%)3602(Top 32%)3602(Top 74%)
15K9.32 mi3.11 mi13379+483682+123682+1213241(Top 50%)3630(Top 32%)3630(Top 74%)
20K12.43 mi3.11 mi13480-1013774-923774-9213913(Top 52%)4060(Top 36%)4060(Top 83%)
Half13.11 mi0.68 mi13507-273787-133787-1314135(Top 53%)4166(Top 36%)4166(Top 85%)
25K15.53 mi2.42 mi13719-2123938-1513938-15114893(Top 56%)4760(Top 42%)4760(Top 97%)
30K18.64 mi3.11 mi13939-2204109-1714109-17114754(Top 55%)4785(Top 42%)4785(Top 98%)
20M20.00 mi1.36 mi14006-674170-614170-6114756(Top 55%)4856(Top 43%)4856(Top 99%)
21M21.00 mi1.00 mi13961+454160+104160+1014004(Top 53%)4487(Top 39%)4487(Top 92%)
35K21.75 mi0.75 mi13994-334194-344194-3415116(Top 57%)5167(Top 45%)5167(Top 106%)
23M23.00 mi1.25 mi14049-554257-634257-6315288(Top 57%)5328(Top 47%)5328(Top 109%)
24M24.00 mi1.00 mi14072-234295-384295-3814577(Top 55%)4999(Top 44%)4999(Top 102%)
40K24.85 mi0.85 mi14076-44320-254320-2514486(Top 54%)5016(Top 44%)5016(Top 103%)
25.2M25.20 mi0.35 mi14069+74320432014128(Top 53%)4812(Top 42%)4812(Top 99%)
Finish26.22 mi1.02 mi13989+804288+324288+3212361(Top 46%)3892(Top 34%)3892(Top 80%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21stories
+97ft-345ft

Overall

13241

Females

3630

F18-39

3630

5K→10K

3.1 - 6.2 mi

Top 50%
×5stories
+79ft-138ft

Overall

13284

Females

3602

F18-39

3602

10K→15K

6.2 - 9.3 mi

Top 50%
×3stories
+67ft-78ft

Overall

13241

Females

3630

F18-39

3630

15K→20K

9.3 - 12.4 mi

Top 52%
×5stories
+106ft-86ft

Overall

13913

Females

4060

F18-39

4060

20K→Half

12.4 - 13.1 mi

Top 53%
×2stories
+19ft-37ft

Overall

14135

Females

4166

F18-39

4166

Half→25K

13.1 - 15.5 mi

Top 56%
×4stories
+66ft-88ft

Overall

14893

Females

4760

F18-39

4760

25K→30K

15.5 - 18.6 mi

Top 55%
×9stories
+181ft-148ft

Overall

14754

Females

4785

F18-39

4785

30K→20M

18.6 - 20.0 mi

Top 55%
×5stories
+64ft-50ft

Overall

14756

Females

4856

F18-39

4856

20M→21M

20.0 - 21.0 mi

Top 53%
×8stories
+106ft-24ft

Overall

14004

Females

4487

F18-39

4487

21M→35K

21.0 - 21.8 mi

Top 57%
×7stories
+17ft-86ft

Overall

15116

Females

5167

F18-39

5167

35K→23M

21.8 - 23.0 mi

Top 57%
×5stories
+23ft-63ft

Overall

15288

Females

5328

F18-39

5328

23M→24M

23.0 - 24.0 mi

Top 55%
×6stories
+12ft-82ft

Overall

14577

Females

4999

F18-39

4999

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

14486

Females

5016

F18-39

5016

40K→25.2M

24.9 - 25.2 mi

Top 53%
×1story
+13ft-16ft

Overall

14128

Females

4812

F18-39

4812

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2stories
+22ft-21ft

Overall

12361

Females

3892

F18-39

3892

Passing Analysis

Category:
Athletes Passed
1575
Passed By
1935
Net Change
-360
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13629
5K → 10K408206+202#13629#13427
10K → 15K233185+48#13427#13379
15K → 20K145246-101#13379#13480
20K → Half2249-27#13480#13507
Half → 25K79291-212#13507#13719
25K → 30K120340-220#13719#13939
30K → 20M72139-67#13939#14006
20M → 21M11570+45#14006#13961
21M → 35K3669-33#13961#13994
35K → 23M67122-55#13994#14049
23M → 24M6285-23#14049#14072
24M → 40K6872-4#14072#14076
40K → 25.2M3932+7#14076#14069
25.2M → Finish10929+80#14069#13989
TOTALS15751935-360
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing