Boston Marathon logo
BOSTON MARATHON 2023

Isabella Zeller

Bib: 31420•F

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F40-44)
#0 / 1878
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
29:53
Rank: #22432
Start → 5K
29:53 | 9:37/mi
10K· 6.21 mi
56:43
Rank: #21160 (+1272)
5K → 10K
26:50 | 8:38/mi
15K· 9.32 mi
1:23:23
Rank: #20329 (+831)
10K → 15K
26:40 | 8:35/mi
20K· 12.43 mi
1:50:42
Rank: #19894 (+435)
15K → 20K
27:19 | 8:48/mi
Half· 13.11 mi
1:56:33
Rank: #19809 (+85)
20K → Half
5:51 | 8:34/mi
25K· 15.53 mi
2:17:51
Rank: #19487 (+322)
Half → 25K
21:18 | 8:47/mi
30K· 18.64 mi
2:45:56
Rank: #19114 (+373)
25K → 30K
28:05 | 9:02/mi
20M
2:58:33
Rank: #19011 (+103)
30K → 20M
12:37 | 9:17/mi
21M
3:08:27
Rank: #18933 (+78)
20M → 21M
9:54 | 9:54/mi
35K· 21.75 mi
3:14:55
Rank: #18826 (+107)
21M → 35K
6:28 | 8:39/mi
23M
3:26:32
Rank: #18721 (+105)
35K → 23M
11:37 | 9:17/mi
24M
3:35:28
Rank: #18646 (+75)
23M → 24M
8:56 | 8:56/mi
40K· 24.85 mi
3:43:13
Rank: #18555 (+91)
24M → 40K
7:45 | 9:04/mi
25.2M
3:46:41
Rank: #18536 (+19)
40K → 25.2M
3:28 | 10:03/mi
Finish· 26.22 mi
3:55:47
Rank: #18512 (+24)
25.2M → Finish
9:06 | 8:56/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
Time1:56:33
Pace8:53 /mi
2nd Half
Distance13.11 mi
Time1:59:14
Pace9:06 /mi
📊Positive Split: 2.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:1729:539:3729:53
9:37
-
10K
6.21 mi12:17:0756:439:0826:50
8:38
-0:59
15K
9.32 mi12:43:471:23:238:5726:40
8:35
-0:03
20K
12.43 mi13:11:061:50:428:5427:19
8:48
+0:13
Half
13.11 mi13:16:571:56:338:535:51
8:34
-0:14
25K
15.53 mi13:38:152:17:518:5221:18
8:47
+0:13
30K
18.64 mi14:06:202:45:568:5428:05
9:02
+0:15
20M
20.00 mi14:18:572:58:338:5612:37
9:17
+0:15
21M
21.00 mi14:28:513:08:278:589:54
9:54
+0:37
35K
21.75 mi14:35:193:14:558:586:28
8:39
-1:15
23M
23.00 mi14:46:563:26:328:5911:37
9:17
+0:38
24M
24.00 mi14:55:523:35:288:598:56
8:56
-0:21
40K
24.85 mi15:03:373:43:138:597:45
9:04
+0:08
25.2M
25.20 mi15:07:053:46:419:003:28
10:03
+0:59
Finish
26.22 mi15:16:113:55:479:009:06
8:56
-1:07

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

8:34 /mi

Average Pace

9:00 /mi

Slowest Pace

10:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:12:32

82% of race

Time at Steady Pace

43:15

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:00 /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 mi11:50:1729:539:3729:53
9:37
#22432
10K
6.21 mi12:17:0756:439:0826:50
8:38
#21160
15K
9.32 mi12:43:471:23:238:5726:40
8:35
#20329
20K
12.43 mi13:11:061:50:428:5427:19
8:48
#19894
Half
13.11 mi13:16:571:56:338:535:51
8:34
#19809
25K
15.53 mi13:38:152:17:518:5221:18
8:47
#19487
30K
18.64 mi14:06:202:45:568:5428:05
9:02
#19114
20M
20.00 mi14:18:572:58:338:5612:37
9:17
#19011
21M
21.00 mi14:28:513:08:278:589:54
9:54
#18933
35K
21.75 mi14:35:193:14:558:586:28
8:39
#18826
23M
23.00 mi14:46:563:26:328:5911:37
9:17
#18721
24M
24.00 mi14:55:523:35:288:598:56
8:56
#18646
40K
24.85 mi15:03:373:43:138:597:45
9:04
#18555
25.2M
25.20 mi15:07:053:46:419:003:28
10:03
#18536
Finish
26.22 mi15:16:113:55:479:009:06
8:56
#18512
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi224329097909718342(Top 69%)6701(Top 59%)6701(Top 357%)
10K6.21 mi3.10 mi21160+12728396+7018396+70119067(Top 72%)7123(Top 62%)7123(Top 379%)
15K9.32 mi3.11 mi20329+8317921+4757921+47518342(Top 69%)6701(Top 59%)6701(Top 357%)
20K12.43 mi3.11 mi19894+4357656+2657656+26518641(Top 70%)6879(Top 60%)6879(Top 366%)
Half13.11 mi0.68 mi19809+857604+527604+5218245(Top 69%)6640(Top 58%)6640(Top 354%)
25K15.53 mi2.42 mi19487+3227411+1937411+19317892(Top 67%)6514(Top 57%)6514(Top 347%)
30K18.64 mi3.11 mi19114+3737204+2077204+20717393(Top 65%)6299(Top 55%)6299(Top 335%)
20M20.00 mi1.36 mi19011+1037166+387166+3817967(Top 67%)6727(Top 59%)6727(Top 358%)
21M21.00 mi1.00 mi18933+787128+387128+3817670(Top 66%)6569(Top 58%)6569(Top 350%)
35K21.75 mi0.75 mi18826+1077073+557073+5516169(Top 61%)5808(Top 51%)5808(Top 309%)
23M23.00 mi1.25 mi18721+1057028+457028+4517435(Top 65%)6530(Top 57%)6530(Top 348%)
24M24.00 mi1.00 mi18646+756990+386990+3816953(Top 64%)6334(Top 55%)6334(Top 337%)
40K24.85 mi0.85 mi18555+916950+406950+4016518(Top 62%)6148(Top 54%)6148(Top 327%)
25.2M25.20 mi0.35 mi18536+196947+36947+317642(Top 66%)6769(Top 59%)6769(Top 360%)
Finish26.22 mi1.02 mi18512+246942+56942+517647(Top 66%)6732(Top 59%)6732(Top 358%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21stories
+97ft-345ft

Overall

18342

Females

6701

F40-44

6701

5K→10K

3.1 - 6.2 mi

Top 72%
×5stories
+79ft-138ft

Overall

19067

Females

7123

F40-44

7123

10K→15K

6.2 - 9.3 mi

Top 69%
×3stories
+67ft-78ft

Overall

18342

Females

6701

F40-44

6701

15K→20K

9.3 - 12.4 mi

Top 70%
×5stories
+106ft-86ft

Overall

18641

Females

6879

F40-44

6879

20K→Half

12.4 - 13.1 mi

Top 69%
×2stories
+19ft-37ft

Overall

18245

Females

6640

F40-44

6640

Half→25K

13.1 - 15.5 mi

Top 67%
×4stories
+66ft-88ft

Overall

17892

Females

6514

F40-44

6514

25K→30K

15.5 - 18.6 mi

Top 65%
×9stories
+181ft-148ft

Overall

17393

Females

6299

F40-44

6299

30K→20M

18.6 - 20.0 mi

Top 67%
×5stories
+64ft-50ft

Overall

17967

Females

6727

F40-44

6727

20M→21M

20.0 - 21.0 mi

Top 66%
×8stories
+106ft-24ft

Overall

17670

Females

6569

F40-44

6569

21M→35K

21.0 - 21.8 mi

Top 61%
×7stories
+17ft-86ft

Overall

16169

Females

5808

F40-44

5808

35K→23M

21.8 - 23.0 mi

Top 65%
×5stories
+23ft-63ft

Overall

17435

Females

6530

F40-44

6530

23M→24M

23.0 - 24.0 mi

Top 64%
×6stories
+12ft-82ft

Overall

16953

Females

6334

F40-44

6334

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

16518

Females

6148

F40-44

6148

40K→25.2M

24.9 - 25.2 mi

Top 66%
×1story
+13ft-16ft

Overall

17642

Females

6769

F40-44

6769

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2stories
+22ft-21ft

Overall

17647

Females

6732

F40-44

6732

Passing Analysis

Category:
Athletes Passed
4192
Passed By
272
Net Change
+3920
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22432
5K → 10K12797+1272#22432#21160
10K → 15K8387+831#21160#20329
15K → 20K45722+435#20329#19894
20K → Half861+85#19894#19809
Half → 25K33210+322#19809#19487
25K → 30K40229+373#19487#19114
30K → 20M13734+103#19114#19011
20M → 21M11739+78#19011#18933
21M → 35K1114+107#18933#18826
35K → 23M13530+105#18826#18721
23M → 24M9520+75#18721#18646
24M → 40K10716+91#18646#18555
40K → 25.2M3314+19#18555#18536
25.2M → Finish6339+24#18536#18512
TOTALS4192272+3920
📊

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