Boston Marathon logo
BOSTON MARATHON 2023

Mia Matsunami

Bib: 7386•F

CA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 20%
Gender (Female)
#0 / 11423
Top 4%
Division (F18-39)
#0 / 4884
Top 8%
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
6:43/mi
20:51
↑ 97↓ 3451.5%
10K· 6.21 mi
6:39/mi
41:30
↑ 79↓ 1380.4%
15K· 9.32 mi
6:41/mi
1:02:16
↑ 67↓ 78
20K· 12.43 mi
6:40/mi
1:22:58
↑ 106↓ 860.1%
Half· 13.11 mi
6:34/mi
1:27:27
↑ 19↓ 370.5%
25K· 15.53 mi
6:38/mi
1:43:33
↑ 66↓ 880.2%
30K· 18.64 mi
6:48/mi
2:04:42
↑ 181↓ 1480.2%
20M
6:57/mi
2:14:08
↑ 64↓ 500.2%
21M
7:48/mi
2:21:56
↑ 106↓ 241.6%
35K· 21.75 mi
6:53/mi
2:27:05
↑ 17↓ 861.7%
23M
8:10/mi
2:37:18
↑ 23↓ 630.6%
24M
8:39/mi
2:45:57
↓ 821.3%
40K· 24.85 mi
9:03/mi
2:53:41
↓ 200.3%
25.2M
9:43/mi
2:57:02
↑ 13↓ 160.2%
Finish· 26.22 mi
8:28/mi
3:05:40
↑ 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
Time1:27:27
Pace6:40 /mi
2nd Half
Distance13.11 mi
Time1:38:13
Pace7:30 /mi
📊Positive Split: 12.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:5120:516:4320:51
6:43
-
10K
6.21 mi10:45:3041:306:4120:39
6:39
-0:04
15K
9.32 mi11:06:161:02:166:4120:46
6:41
+0:02
20K
12.43 mi11:26:581:22:586:4120:42
6:40
-0:01
Half
13.11 mi11:31:271:27:276:404:29
6:34
-0:06
25K
15.53 mi11:47:331:43:336:4016:06
6:38
+0:04
30K
18.64 mi12:08:422:04:426:4121:09
6:48
+0:10
20M
20.00 mi12:18:082:14:086:429:26
6:57
+0:09
21M
21.00 mi12:25:562:21:566:467:48
7:48
+0:51
35K
21.75 mi12:31:052:27:056:465:09
6:53
-0:55
23M
23.00 mi12:41:182:37:186:5010:13
8:10
+1:17
24M
24.00 mi12:49:572:45:576:558:39
8:39
+0:29
40K
24.85 mi12:57:412:53:416:597:44
9:03
+0:24
25.2M
25.20 mi13:01:022:57:027:023:21
9:43
+0:40
Finish
26.22 mi13:09:403:05:407:058:38
8:28
-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

6:34 /mi

Average Pace

7:05 /mi

Slowest Pace

9:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:19:17

75% of race

Time at Slower Pace

46:23

25% of race

Average Pace: 7:05 /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 mi10:24:5120:516:4320:51
6:43
#3792
10K
6.21 mi10:45:3041:306:4120:39
6:39
#3775
15K
9.32 mi11:06:161:02:166:4120:46
6:41
#3833
20K
12.43 mi11:26:581:22:586:4120:42
6:40
#3660
Half
13.11 mi11:31:271:27:276:404:29
6:34
#3633
25K
15.53 mi11:47:331:43:336:4016:06
6:38
#3486
30K
18.64 mi12:08:422:04:426:4121:09
6:48
#3359
20M
20.00 mi12:18:082:14:086:429:26
6:57
#3342
21M
21.00 mi12:25:562:21:566:467:48
7:48
#3530
35K
21.75 mi12:31:052:27:056:465:09
6:53
#3559
23M
23.00 mi12:41:182:37:186:5010:13
8:10
#4109
24M
24.00 mi12:49:572:45:576:558:39
8:39
#4637
40K
24.85 mi12:57:412:53:416:597:44
9:03
#4999
25.2M
25.20 mi13:01:022:57:027:023:21
9:43
#5116
Finish
26.22 mi13:09:403:05:407:058:38
8:28
#5402
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi37922222224003(Top 15%)239(Top 2%)239(Top 5%)
10K6.21 mi3.10 mi3775+17216+6216+63878(Top 15%)221(Top 2%)221(Top 5%)
15K9.32 mi3.11 mi3833-582162164003(Top 15%)239(Top 2%)239(Top 5%)
20K12.43 mi3.11 mi3660+173193+23193+233303(Top 12%)168(Top 1%)168(Top 3%)
Half13.11 mi0.68 mi3633+27191+2191+23313(Top 12%)165(Top 1%)165(Top 3%)
25K15.53 mi2.42 mi3486+147176+15176+152963(Top 11%)138(Top 1%)138(Top 3%)
30K18.64 mi3.11 mi3359+127170+6170+63045(Top 11%)167(Top 1%)167(Top 3%)
20M20.00 mi1.36 mi3342+17174-4174-43699(Top 14%)253(Top 2%)253(Top 5%)
21M21.00 mi1.00 mi3530-188184-10184-106195(Top 23%)849(Top 7%)849(Top 17%)
35K21.75 mi0.75 mi3559-29188-4188-44729(Top 18%)446(Top 4%)446(Top 9%)
23M23.00 mi1.25 mi4109-550258-70258-7010896(Top 41%)2963(Top 26%)2963(Top 61%)
24M24.00 mi1.00 mi4637-528319-61319-6115364(Top 58%)5445(Top 48%)5445(Top 111%)
40K24.85 mi0.85 mi4999-362393-74393-7416384(Top 62%)6057(Top 53%)6057(Top 124%)
25.2M25.20 mi0.35 mi5116-117415-22415-2216171(Top 61%)5938(Top 52%)5938(Top 122%)
Finish26.22 mi1.02 mi5402-286473-58473-5815236(Top 57%)5379(Top 47%)5379(Top 110%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 15%
×21story building
+97ft-345ft

Overall

4003

Females

239

F18-39

239

5K→10K

3.1 - 6.2 mi

Top 15%
×5story building
+79ft-138ft

Overall

3878

Females

221

F18-39

221

10K→15K

6.2 - 9.3 mi

Top 15%
×3story building
+67ft-78ft

Overall

4003

Females

239

F18-39

239

15K→20K

9.3 - 12.4 mi

Top 12%
×5story building
+106ft-86ft

Overall

3303

Females

168

F18-39

168

20K→Half

12.4 - 13.1 mi

Top 12%
×2story building
+19ft-37ft

Overall

3313

Females

165

F18-39

165

Half→25K

13.1 - 15.5 mi

Top 11%
×4story building
+66ft-88ft

Overall

2963

Females

138

F18-39

138

25K→30K

15.5 - 18.6 mi

Top 11%
×9story building
+181ft-148ft

Overall

3045

Females

167

F18-39

167

30K→20M

18.6 - 20.0 mi

Top 14%
×5story building
+64ft-50ft

Overall

3699

Females

253

F18-39

253

20M→21M

20.0 - 21.0 mi

Top 23%
×8story building
+106ft-24ft

Overall

6195

Females

849

F18-39

849

21M→35K

21.0 - 21.8 mi

Top 18%
×7story building
+17ft-86ft

Overall

4729

Females

446

F18-39

446

35K→23M

21.8 - 23.0 mi

Top 41%
×5story building
+23ft-63ft

Overall

10896

Females

2963

F18-39

2963

23M→24M

23.0 - 24.0 mi

Top 58%
×6story building
+12ft-82ft

Overall

15364

Females

5445

F18-39

5445

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

16384

Females

6057

F18-39

6057

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

16171

Females

5938

F18-39

5938

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2story building
+22ft-21ft

Overall

15236

Females

5379

F18-39

5379

Passing Analysis

Category:
Athletes Passed
991
Passed By
2601
Net Change
-1610
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3792
5K → 10K220203+17#3792#3775
10K → 15K81139-58#3775#3833
15K → 20K20431+173#3833#3660
20K → Half358+27#3660#3633
Half → 25K15912+147#3633#3486
25K → 30K15932+127#3486#3359
30K → 20M7053+17#3359#3342
20M → 21M12200-188#3342#3530
21M → 35K2857-29#3530#3559
35K → 23M6556-550#3559#4109
23M → 24M3531-528#4109#4637
24M → 40K6368-362#4637#4999
40K → 25.2M2119-117#4999#5116
25.2M → Finish6292-286#5116#5402
TOTALS9912601-1610
📊

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