Boston Marathon logo
BOSTON MARATHON 2023

Heidi Mitchell

Bib: 19731•F

CT

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 48%
Gender (Female)
#0 / 11423
Top 31%
Masters (Masters Women)
#0 / 6539
Top 18%
Division (F55-59)
#0 / 815
Top 6%
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
8:24/mi
26:07
↑ 97↓ 3451.5%
10K· 6.21 mi
8:00/mi
50:58
↑ 79↓ 1380.4%
15K· 9.32 mi
7:59/mi
1:15:47
↑ 67↓ 78
20K· 12.43 mi
8:03/mi
1:40:47
↑ 106↓ 860.1%
Half· 13.11 mi
7:53/mi
1:46:10
↑ 19↓ 370.5%
25K· 15.53 mi
8:00/mi
2:05:34
↑ 66↓ 880.2%
30K· 18.64 mi
8:11/mi
2:30:59
↑ 181↓ 1480.2%
20M
8:09/mi
2:42:04
↑ 64↓ 500.2%
21M
8:34/mi
2:50:38
↑ 106↓ 241.6%
35K· 21.75 mi
7:56/mi
2:56:34
↑ 17↓ 861.7%
23M
8:07/mi
3:06:44
↑ 23↓ 630.6%
24M
7:49/mi
3:14:33
↓ 821.3%
40K· 24.85 mi
7:57/mi
3:21:21
↓ 200.3%
25.2M
8:19/mi
3:24:13
↑ 13↓ 160.2%
Finish· 26.22 mi
7:29/mi
3:31:51
↑ 22↓ 21

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
Time1:46:10
Pace8:06 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:45:41
Pace8:04 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:5926:078:2426:07
8:24
-
10K
6.21 mi11:42:5050:588:1224:51
8:00
-0:24
15K
9.32 mi12:07:391:15:478:0824:49
7:59
-0:01
20K
12.43 mi12:32:391:40:478:0725:00
8:03
+0:04
Half
13.11 mi12:38:021:46:108:065:23
7:53
-0:10
25K
15.53 mi12:57:262:05:348:0519:24
8:00
+0:07
30K
18.64 mi13:22:512:30:598:0625:25
8:11
+0:11
20M
20.00 mi13:33:562:42:048:0611:05
8:09
-0:02
21M
21.00 mi13:42:302:50:388:088:34
8:34
+0:25
35K
21.75 mi13:48:262:56:348:075:56
7:56
-0:38
23M
23.00 mi13:58:363:06:448:0710:10
8:07
+0:11
24M
24.00 mi14:06:253:14:338:067:49
7:49
-0:18
40K
24.85 mi14:13:133:21:218:066:48
7:57
+0:08
25.2M
25.20 mi14:16:053:24:138:062:52
8:19
+0:22
Finish
26.22 mi14:23:433:31:518:057:38
7:29
-0:50

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

7:29 /mi

Average Pace

8:05 /mi

Slowest Pace

8:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:54:18

82% of race

Time at Steady Pace

37:33

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:05 /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 mi11:17:5926:078:2426:07
8:24
#16920
10K
6.21 mi11:42:5050:588:1224:51
8:00
#15842
15K
9.32 mi12:07:391:15:478:0824:49
7:59
#15346
20K
12.43 mi12:32:391:40:478:0725:00
8:03
#14938
Half
13.11 mi12:38:021:46:108:065:23
7:53
#14868
25K
15.53 mi12:57:262:05:348:0519:24
8:00
#14525
30K
18.64 mi13:22:512:30:598:0625:25
8:11
#14101
20M
20.00 mi13:33:562:42:048:0611:05
8:09
#13854
21M
21.00 mi13:42:302:50:388:088:34
8:34
#13651
35K
21.75 mi13:48:262:56:348:075:56
7:56
#13556
23M
23.00 mi13:58:363:06:448:0710:10
8:07
#13342
24M
24.00 mi14:06:253:14:338:067:49
7:49
#13171
40K
24.85 mi14:13:133:21:218:066:48
7:57
#13019
25.2M
25.20 mi14:16:053:24:138:062:52
8:19
#12942
Finish
26.22 mi14:23:433:31:518:057:38
7:29
#12764
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi169205870587014296(Top 54%)4253(Top 37%)4253(Top 522%)
10K6.21 mi3.10 mi15842+10785182+6885182+68814796(Top 56%)4540(Top 40%)4540(Top 557%)
15K9.32 mi3.11 mi15346+4964880+3024880+30214296(Top 54%)4253(Top 37%)4253(Top 522%)
20K12.43 mi3.11 mi14938+4084643+2374643+23713815(Top 52%)3995(Top 35%)3995(Top 490%)
Half13.11 mi0.68 mi14868+704602+414602+4113545(Top 51%)3821(Top 33%)3821(Top 469%)
25K15.53 mi2.42 mi14525+3434413+1894413+18912770(Top 48%)3504(Top 31%)3504(Top 430%)
30K18.64 mi3.11 mi14101+4244204+2094204+20912214(Top 46%)3311(Top 29%)3311(Top 406%)
20M20.00 mi1.36 mi13854+2474072+1324072+13211425(Top 43%)2960(Top 26%)2960(Top 363%)
21M21.00 mi1.00 mi13651+2033963+1093963+10910907(Top 41%)2823(Top 25%)2823(Top 346%)
35K21.75 mi0.75 mi13556+953919+443919+4411666(Top 44%)3245(Top 28%)3245(Top 398%)
23M23.00 mi1.25 mi13342+2143820+993820+9910646(Top 40%)2849(Top 25%)2849(Top 350%)
24M24.00 mi1.00 mi13171+1713751+693751+699971(Top 37%)2589(Top 23%)2589(Top 318%)
40K24.85 mi0.85 mi13019+1523687+643687+649783(Top 37%)2559(Top 22%)2559(Top 314%)
25.2M25.20 mi0.35 mi12942+773650+373650+378512(Top 32%)2063(Top 18%)2063(Top 253%)
Finish26.22 mi1.02 mi12764+1783562+883562+888530(Top 32%)2051(Top 18%)2051(Top 252%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21story building
+97ft-345ft

Overall

14296

Females

4253

F55-59

4253

5K→10K

3.1 - 6.2 mi

Top 56%
×5story building
+79ft-138ft

Overall

14796

Females

4540

F55-59

4540

10K→15K

6.2 - 9.3 mi

Top 54%
×3story building
+67ft-78ft

Overall

14296

Females

4253

F55-59

4253

15K→20K

9.3 - 12.4 mi

Top 52%
×5story building
+106ft-86ft

Overall

13815

Females

3995

F55-59

3995

20K→Half

12.4 - 13.1 mi

Top 51%
×2story building
+19ft-37ft

Overall

13545

Females

3821

F55-59

3821

Half→25K

13.1 - 15.5 mi

Top 48%
×4story building
+66ft-88ft

Overall

12770

Females

3504

F55-59

3504

25K→30K

15.5 - 18.6 mi

Top 46%
×9story building
+181ft-148ft

Overall

12214

Females

3311

F55-59

3311

30K→20M

18.6 - 20.0 mi

Top 43%
×5story building
+64ft-50ft

Overall

11425

Females

2960

F55-59

2960

20M→21M

20.0 - 21.0 mi

Top 41%
×8story building
+106ft-24ft

Overall

10907

Females

2823

F55-59

2823

21M→35K

21.0 - 21.8 mi

Top 44%
×7story building
+17ft-86ft

Overall

11666

Females

3245

F55-59

3245

35K→23M

21.8 - 23.0 mi

Top 40%
×5story building
+23ft-63ft

Overall

10646

Females

2849

F55-59

2849

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

9971

Females

2589

F55-59

2589

24M→40K

24.0 - 24.9 mi

Top 37%
×1story
+6ft-20ft

Overall

9783

Females

2559

F55-59

2559

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

8512

Females

2063

F55-59

2063

25.2M→Finish

25.2 - 26.2 mi

Top 32%
×2story building
+22ft-21ft

Overall

8530

Females

2051

F55-59

2051

Passing Analysis

Category:
Athletes Passed
4394
Passed By
238
Net Change
+4156
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16920
5K → 10K113355+1078#16920#15842
10K → 15K53236+496#15842#15346
15K → 20K43931+408#15346#14938
20K → Half799+70#14938#14868
Half → 25K35613+343#14868#14525
25K → 30K44420+424#14525#14101
30K → 20M2569+247#14101#13854
20M → 21M22017+203#13854#13651
21M → 35K10813+95#13651#13556
35K → 23M22410+214#13556#13342
23M → 24M18514+171#13342#13171
24M → 40K1553+152#13171#13019
40K → 25.2M803+77#13019#12942
25.2M → Finish1835+178#12942#12764
TOTALS4394238+4156
📊

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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing