Boston Marathon logo
BOSTON MARATHON 2023

Brigitte Belk

Bib: 30482•F

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 43%
Division (F50-54)
#0 / 1207
Top 36%
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
9:01/mi
28:02
↑ 97↓ 3451.5%
10K· 6.21 mi
8:13/mi
53:33
↑ 79↓ 1380.4%
15K· 9.32 mi
8:13/mi
1:19:04
↑ 67↓ 78
20K· 12.43 mi
8:13/mi
1:44:37
↑ 106↓ 860.1%
Half· 13.11 mi
8:11/mi
1:50:12
↑ 19↓ 370.5%
25K· 15.53 mi
8:26/mi
2:10:38
↑ 66↓ 880.2%
30K· 18.64 mi
8:48/mi
2:37:59
↑ 181↓ 1480.2%
20M
9:18/mi
2:50:37
↑ 64↓ 500.2%
21M
10:23/mi
3:01:00
↑ 106↓ 241.6%
35K· 21.75 mi
8:29/mi
3:07:21
↑ 17↓ 861.7%
23M
9:17/mi
3:18:58
↑ 23↓ 630.6%
24M
8:49/mi
3:27:47
↓ 821.3%
40K· 24.85 mi
8:56/mi
3:35:25
↓ 200.3%
25.2M
10:21/mi
3:38:59
↑ 13↓ 160.2%
Finish· 26.22 mi
8:55/mi
3:48:04
↑ 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 HalfFaster
Distance13.11 mi
Time1:50:12
Pace8:24 /mi
2nd Half
Distance13.11 mi
Time1:57:52
Pace8:59 /mi
📊Positive Split: 7.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:5628:029:0128:02
9:01
-
10K
6.21 mi12:12:2753:338:3725:31
8:13
-0:48
15K
9.32 mi12:37:581:19:048:2925:31
8:13
0:00
20K
12.43 mi13:03:311:44:378:2525:33
8:13
0:00
Half
13.11 mi13:09:061:50:128:245:35
8:11
-0:02
25K
15.53 mi13:29:322:10:388:2520:26
8:26
+0:15
30K
18.64 mi13:56:532:37:598:2827:21
8:48
+0:22
20M
20.00 mi14:09:312:50:378:3212:38
9:18
+0:30
21M
21.00 mi14:19:543:01:008:3710:23
10:23
+1:05
35K
21.75 mi14:26:153:07:218:376:21
8:29
-1:54
23M
23.00 mi14:37:523:18:588:3911:37
9:17
+0:48
24M
24.00 mi14:46:413:27:478:398:49
8:49
-0:28
40K
24.85 mi14:54:193:35:258:407:38
8:56
+0:07
25.2M
25.20 mi14:57:533:38:598:413:34
10:21
+1:25
Finish
26.22 mi15:06:583:48:048:429:05
8:55
-1:26

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

8:11 /mi

Average Pace

8:42 /mi

Slowest Pace

10:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:42:36

45% of race

Time at Steady Pace

1:27:16

38% of race

Time at Slower Pace

38:12

17% of race

Average Pace: 8:42 /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 mi11:46:5628:029:0128:02
9:01
#20560
10K
6.21 mi12:12:2753:338:3725:31
8:13
#18621
15K
9.32 mi12:37:581:19:048:2925:31
8:13
#17736
20K
12.43 mi13:03:311:44:378:2525:33
8:13
#17062
Half
13.11 mi13:09:061:50:128:245:35
8:11
#16993
25K
15.53 mi13:29:322:10:388:2520:26
8:26
#16802
30K
18.64 mi13:56:532:37:598:2827:21
8:48
#16632
20M
20.00 mi14:09:312:50:378:3212:38
9:18
#16725
21M
21.00 mi14:19:543:01:008:3710:23
10:23
#16913
35K
21.75 mi14:26:153:07:218:376:21
8:29
#16851
23M
23.00 mi14:37:523:18:588:3911:37
9:17
#16879
24M
24.00 mi14:46:413:27:478:398:49
8:49
#16869
40K
24.85 mi14:54:193:35:258:407:38
8:56
#16803
25.2M
25.20 mi14:57:533:38:598:413:34
10:21
#16848
Finish
26.22 mi15:06:583:48:048:429:05
8:55
#16867
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi205608148814815968(Top 60%)5281(Top 46%)5281(Top 438%)
10K6.21 mi3.10 mi18621+19396893+12556893+125516370(Top 61%)5498(Top 48%)5498(Top 456%)
15K9.32 mi3.11 mi17736+8856362+5316362+53115968(Top 60%)5281(Top 46%)5281(Top 438%)
20K12.43 mi3.11 mi17062+6745968+3945968+39415128(Top 57%)4791(Top 42%)4791(Top 397%)
Half13.11 mi0.68 mi16993+695929+395929+3915779(Top 59%)5185(Top 45%)5185(Top 430%)
25K15.53 mi2.42 mi16802+1915837+925837+9215772(Top 59%)5302(Top 46%)5302(Top 439%)
30K18.64 mi3.11 mi16632+1705769+685769+6816100(Top 60%)5561(Top 49%)5561(Top 461%)
20M20.00 mi1.36 mi16725-935824-555824-5518013(Top 68%)6746(Top 59%)6746(Top 559%)
21M21.00 mi1.00 mi16913-1885933-1095933-10919226(Top 72%)7474(Top 65%)7474(Top 619%)
35K21.75 mi0.75 mi16851+625906+275906+2715304(Top 57%)5308(Top 46%)5308(Top 440%)
23M23.00 mi1.25 mi16879-285952-465952-4617420(Top 65%)6515(Top 57%)6515(Top 540%)
24M24.00 mi1.00 mi16869+105964-125964-1216317(Top 61%)5980(Top 52%)5980(Top 495%)
40K24.85 mi0.85 mi16803+665945+195945+1915794(Top 59%)5738(Top 50%)5738(Top 475%)
25.2M25.20 mi0.35 mi16848-455976-315976-3118620(Top 70%)7282(Top 64%)7282(Top 603%)
Finish26.22 mi1.02 mi16867-195999-235999-2317562(Top 66%)6692(Top 59%)6692(Top 554%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21story building
+97ft-345ft

Overall

15968

Females

5281

F50-54

5281

5K→10K

3.1 - 6.2 mi

Top 61%
×5story building
+79ft-138ft

Overall

16370

Females

5498

F50-54

5498

10K→15K

6.2 - 9.3 mi

Top 60%
×3story building
+67ft-78ft

Overall

15968

Females

5281

F50-54

5281

15K→20K

9.3 - 12.4 mi

Top 57%
×5story building
+106ft-86ft

Overall

15128

Females

4791

F50-54

4791

20K→Half

12.4 - 13.1 mi

Top 59%
×2story building
+19ft-37ft

Overall

15779

Females

5185

F50-54

5185

Half→25K

13.1 - 15.5 mi

Top 59%
×4story building
+66ft-88ft

Overall

15772

Females

5302

F50-54

5302

25K→30K

15.5 - 18.6 mi

Top 60%
×9story building
+181ft-148ft

Overall

16100

Females

5561

F50-54

5561

30K→20M

18.6 - 20.0 mi

Top 68%
×5story building
+64ft-50ft

Overall

18013

Females

6746

F50-54

6746

20M→21M

20.0 - 21.0 mi

Top 72%
×8story building
+106ft-24ft

Overall

19226

Females

7474

F50-54

7474

21M→35K

21.0 - 21.8 mi

Top 57%
×7story building
+17ft-86ft

Overall

15304

Females

5308

F50-54

5308

35K→23M

21.8 - 23.0 mi

Top 65%
×5story building
+23ft-63ft

Overall

17420

Females

6515

F50-54

6515

23M→24M

23.0 - 24.0 mi

Top 61%
×6story building
+12ft-82ft

Overall

16317

Females

5980

F50-54

5980

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

15794

Females

5738

F50-54

5738

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

18620

Females

7282

F50-54

7282

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

17562

Females

6692

F50-54

6692

Passing Analysis

Category:
Athletes Passed
4552
Passed By
859
Net Change
+3693
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20560
5K → 10K195920+1939#20560#18621
10K → 15K89510+885#18621#17736
15K → 20K6839+674#17736#17062
20K → Half756+69#17062#16993
Half → 25K22029+191#16993#16802
25K → 30K25383+170#16802#16632
30K → 20M52145-93#16632#16725
20M → 21M31219-188#16725#16913
21M → 35K8018+62#16913#16851
35K → 23M7098-28#16851#16879
23M → 24M6555+10#16879#16869
24M → 40K9226+66#16869#16803
40K → 25.2M1459-45#16803#16848
25.2M → Finish6382-19#16848#16867
TOTALS4552859+3693
📊

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