Boston Marathon logo
BOSTON MARATHON 2023

Danielle Senzer

Bib: 16818•F

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 44%
Gender (Female)
#0 / 11423
Top 26%
Division (F18-39)
#0 / 4884
Top 43%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:01
Rank: #14381
Start → 5K
8:03/mi
25:01 split
10K· 6.21 mi
49:26
Rank: #14039 (+342)
5K → 10K
7:52/mi
24:25 split
15K· 9.32 mi
1:13:37
Rank: #13563 (+476)
10K → 15K
7:47/mi
24:11 split
20K· 12.43 mi
1:38:38
Rank: #13597 (-34)
15K → 20K
8:03/mi
25:01 split
Half· 13.11 mi
1:43:52
Rank: #13501 (+96)
20K → Half
7:40/mi
5:14 split
25K· 15.53 mi
2:03:07
Rank: #13278 (+223)
Half → 25K
7:56/mi
19:15 split
30K· 18.64 mi
2:27:56
Rank: #12785 (+493)
25K → 30K
7:59/mi
24:49 split
20M
2:38:54
Rank: #12593 (+192)
30K → 20M
8:04/mi
10:58 split
21M
2:47:24
Rank: #12424 (+169)
20M → 21M
8:30/mi
8:30 split
35K· 21.75 mi
2:53:22
Rank: #12407 (+17)
21M → 35K
7:59/mi
5:58 split
23M
3:03:24
Rank: #12246 (+161)
35K → 23M
8:01/mi
10:02 split
24M
3:11:08
Rank: #12111 (+135)
23M → 24M
7:44/mi
7:44 split
40K· 24.85 mi
3:17:50
Rank: #11967 (+144)
24M → 40K
7:50/mi
6:42 split
25.2M
3:20:37
Rank: #11867 (+100)
40K → 25.2M
8:04/mi
2:47 split
Finish· 26.22 mi
3:28:02
Rank: #11628 (+239)
25.2M → Finish
7:17/mi
7:25 split

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 Half⚖️ Balanced
Distance13.11 mi
Time1:43:52
Pace7:55 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:44:10
Pace7:57 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:4925:018:0325:01
8:03
-
10K
6.21 mi11:42:1449:267:5724:25
7:52
-0:11
15K
9.32 mi12:06:251:13:377:5424:11
7:47
-0:05
20K
12.43 mi12:31:261:38:387:5625:01
8:03
+0:16
Half
13.11 mi12:36:401:43:527:555:14
7:40
-0:23
25K
15.53 mi12:55:552:03:077:5619:15
7:56
+0:16
30K
18.64 mi13:20:442:27:567:5624:49
7:59
+0:03
20M
20.00 mi13:31:422:38:547:5710:58
8:04
+0:05
21M
21.00 mi13:40:122:47:247:588:30
8:30
+0:26
35K
21.75 mi13:46:102:53:227:585:58
7:59
-0:31
23M
23.00 mi13:56:123:03:247:5810:02
8:01
+0:02
24M
24.00 mi14:03:563:11:087:587:44
7:44
-0:17
40K
24.85 mi14:10:383:17:507:586:42
7:50
+0:06
25.2M
25.20 mi14:13:253:20:377:582:47
8:04
+0:14
Finish
26.22 mi14:20:503:28:027:567:25
7:17
-0:47

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

7:17 /mi

Average Pace

7:56 /mi

Slowest Pace

8:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:05:43

60% of race

Time at Steady Pace

1:22:19

40% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:56 /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 mi11:17:4925:018:0325:01
8:03
#14381
10K
6.21 mi11:42:1449:267:5724:25
7:52
#14039
15K
9.32 mi12:06:251:13:377:5424:11
7:47
#13563
20K
12.43 mi12:31:261:38:387:5625:01
8:03
#13597
Half
13.11 mi12:36:401:43:527:555:14
7:40
#13501
25K
15.53 mi12:55:552:03:077:5619:15
7:56
#13278
30K
18.64 mi13:20:442:27:567:5624:49
7:59
#12785
20M
20.00 mi13:31:422:38:547:5710:58
8:04
#12593
21M
21.00 mi13:40:122:47:247:588:30
8:30
#12424
35K
21.75 mi13:46:102:53:227:585:58
7:59
#12407
23M
23.00 mi13:56:123:03:247:5810:02
8:01
#12246
24M
24.00 mi14:03:563:11:087:587:44
7:44
#12111
40K
24.85 mi14:10:383:17:507:586:42
7:50
#11967
25.2M
25.20 mi14:13:253:20:377:582:47
8:04
#11867
Finish
26.22 mi14:20:503:28:027:567:25
7:17
#11628
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi143814254425412601(Top 47%)3236(Top 28%)3236(Top 66%)
10K6.21 mi3.10 mi14039+3424064+1904064+19013639(Top 51%)3813(Top 33%)3813(Top 78%)
15K9.32 mi3.11 mi13563+4763794+2703794+27012601(Top 47%)3236(Top 28%)3236(Top 66%)
20K12.43 mi3.11 mi13597-343841-473841-4713852(Top 52%)4011(Top 35%)4011(Top 82%)
Half13.11 mi0.68 mi13501+963781+603781+6011699(Top 44%)2743(Top 24%)2743(Top 56%)
25K15.53 mi2.42 mi13278+2233666+1153666+11512227(Top 46%)3205(Top 28%)3205(Top 66%)
30K18.64 mi3.11 mi12785+4933420+2463420+24610816(Top 41%)2554(Top 22%)2554(Top 52%)
20M20.00 mi1.36 mi12593+1923330+903330+9010826(Top 41%)2654(Top 23%)2654(Top 54%)
21M21.00 mi1.00 mi12424+1693247+833247+8310513(Top 39%)2634(Top 23%)2634(Top 54%)
35K21.75 mi0.75 mi12407+173261-143261-1411960(Top 45%)3396(Top 30%)3396(Top 70%)
23M23.00 mi1.25 mi12246+1613193+683193+689863(Top 37%)2447(Top 21%)2447(Top 50%)
24M24.00 mi1.00 mi12111+1353139+543139+549337(Top 35%)2267(Top 20%)2267(Top 46%)
40K24.85 mi0.85 mi11967+1443080+593080+598944(Top 34%)2160(Top 19%)2160(Top 44%)
25.2M25.20 mi0.35 mi11867+1003028+523028+527032(Top 26%)1455(Top 13%)1455(Top 30%)
Finish26.22 mi1.02 mi11628+2392921+1072921+1077022(Top 26%)1449(Top 13%)1449(Top 30%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21story building
+97ft-345ft

Overall

12601

Females

3236

F18-39

3236

5K→10K

3.1 - 6.2 mi

Top 51%
×5story building
+79ft-138ft

Overall

13639

Females

3813

F18-39

3813

10K→15K

6.2 - 9.3 mi

Top 47%
×3story building
+67ft-78ft

Overall

12601

Females

3236

F18-39

3236

15K→20K

9.3 - 12.4 mi

Top 52%
×5story building
+106ft-86ft

Overall

13852

Females

4011

F18-39

4011

20K→Half

12.4 - 13.1 mi

Top 44%
×2story building
+19ft-37ft

Overall

11699

Females

2743

F18-39

2743

Half→25K

13.1 - 15.5 mi

Top 46%
×4story building
+66ft-88ft

Overall

12227

Females

3205

F18-39

3205

25K→30K

15.5 - 18.6 mi

Top 41%
×9story building
+181ft-148ft

Overall

10816

Females

2554

F18-39

2554

30K→20M

18.6 - 20.0 mi

Top 41%
×5story building
+64ft-50ft

Overall

10826

Females

2654

F18-39

2654

20M→21M

20.0 - 21.0 mi

Top 39%
×8story building
+106ft-24ft

Overall

10513

Females

2634

F18-39

2634

21M→35K

21.0 - 21.8 mi

Top 45%
×7story building
+17ft-86ft

Overall

11960

Females

3396

F18-39

3396

35K→23M

21.8 - 23.0 mi

Top 37%
×5story building
+23ft-63ft

Overall

9863

Females

2447

F18-39

2447

23M→24M

23.0 - 24.0 mi

Top 35%
×6story building
+12ft-82ft

Overall

9337

Females

2267

F18-39

2267

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

8944

Females

2160

F18-39

2160

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

7032

Females

1455

F18-39

1455

25.2M→Finish

25.2 - 26.2 mi

Top 26%
×2story building
+22ft-21ft

Overall

7022

Females

1449

F18-39

1449

Passing Analysis

Category:
Athletes Passed
3340
Passed By
587
Net Change
+2753
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14381
5K → 10K498156+342#14381#14039
10K → 15K51337+476#14039#13563
15K → 20K175209-34#13563#13597
20K → Half1015+96#13597#13501
Half → 25K25734+223#13501#13278
25K → 30K51421+493#13278#12785
30K → 20M21523+192#12785#12593
20M → 21M18415+169#12593#12424
21M → 35K6245+17#12424#12407
35K → 23M17615+161#12407#12246
23M → 24M14813+135#12246#12111
24M → 40K1539+144#12111#11967
40K → 25.2M1000+100#11967#11867
25.2M → Finish2445+239#11867#11628
TOTALS3340587+2753
📊

Passing Visuals

Category:
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