Boston Marathon logo
BOSTON MARATHON 2023

Martha Clemmer

Bib: 4869•F

TN

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 11%
Gender (Female)
#0 / 11423
Top 1%
Division (F18-39)
#0 / 4884
Top 3%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:10
Rank: #4816
Start → 5K
21:10 | 6:49/mi
10K· 6.21 mi
42:02
Rank: #4655 (+161)
5K → 10K
20:52 | 6:43/mi
15K· 9.32 mi
1:02:37
Rank: #4199 (+456)
10K → 15K
20:35 | 6:38/mi
20K· 12.43 mi
1:23:16
Rank: #3873 (+326)
15K → 20K
20:39 | 6:39/mi
Half· 13.11 mi
1:27:44
Rank: #3817 (+56)
20K → Half
4:28 | 6:33/mi
25K· 15.53 mi
1:43:46
Rank: #3601 (+216)
Half → 25K
16:02 | 6:37/mi
30K· 18.64 mi
2:04:46
Rank: #3384 (+217)
25K → 30K
21:00 | 6:46/mi
20M
2:13:59
Rank: #3283 (+101)
30K → 20M
9:13 | 6:47/mi
21M
2:21:11
Rank: #3250 (+33)
20M → 21M
7:12 | 7:12/mi
35K· 21.75 mi
2:26:06
Rank: #3224 (+26)
21M → 35K
4:55 | 6:34/mi
23M
2:34:41
Rank: #3169 (+55)
35K → 23M
8:35 | 6:51/mi
24M
2:41:26
Rank: #3164 (+5)
23M → 24M
6:45 | 6:45/mi
40K· 24.85 mi
2:47:06
Rank: #3071 (+93)
24M → 40K
5:40 | 6:38/mi
25.2M
2:49:31
Rank: #3029 (+42)
40K → 25.2M
2:25 | 7:00/mi
Finish· 26.22 mi
2:56:00
Rank: #2927 (+102)
25.2M → Finish
6:29 | 6:22/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 Half⚖️ Balanced
Distance13.11 mi
Time1:27:44
Pace6:42 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:28:16
Pace6:44 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:3421:106:4921:10
6:49
-
10K
6.21 mi10:45:2642:026:4620:52
6:43
-0:06
15K
9.32 mi11:06:011:02:376:4320:35
6:38
-0:05
20K
12.43 mi11:26:401:23:166:4220:39
6:39
+0:01
Half
13.11 mi11:31:081:27:446:424:28
6:33
-0:06
25K
15.53 mi11:47:101:43:466:4116:02
6:37
+0:04
30K
18.64 mi12:08:102:04:466:4221:00
6:46
+0:09
20M
20.00 mi12:17:232:13:596:429:13
6:47
+0:01
21M
21.00 mi12:24:352:21:116:437:12
7:12
+0:25
35K
21.75 mi12:29:302:26:066:434:55
6:34
-0:38
23M
23.00 mi12:38:052:34:416:448:35
6:51
+0:17
24M
24.00 mi12:44:502:41:266:446:45
6:45
-0:06
40K
24.85 mi12:50:302:47:066:435:40
6:38
-0:07
25.2M
25.20 mi12:52:552:49:316:442:25
7:00
+0:22
Finish
26.22 mi12:59:242:56:006:436:29
6:22
-0:38

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

6:22 /mi

Average Pace

6:43 /mi

Slowest Pace

7:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:48:48

96% of race

Time at Steady Pace

7:12

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:43 /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 mi10:24:3421:106:4921:10
6:49
#4816
10K
6.21 mi10:45:2642:026:4620:52
6:43
#4655
15K
9.32 mi11:06:011:02:376:4320:35
6:38
#4199
20K
12.43 mi11:26:401:23:166:4220:39
6:39
#3873
Half
13.11 mi11:31:081:27:446:424:28
6:33
#3817
25K
15.53 mi11:47:101:43:466:4116:02
6:37
#3601
30K
18.64 mi12:08:102:04:466:4221:00
6:46
#3384
20M
20.00 mi12:17:232:13:596:429:13
6:47
#3283
21M
21.00 mi12:24:352:21:116:437:12
7:12
#3250
35K
21.75 mi12:29:302:26:066:434:55
6:34
#3224
23M
23.00 mi12:38:052:34:416:448:35
6:51
#3169
24M
24.00 mi12:44:502:41:266:446:45
6:45
#3164
40K
24.85 mi12:50:302:47:066:435:40
6:38
#3071
25.2M
25.20 mi12:52:552:49:316:442:25
7:00
#3029
Finish
26.22 mi12:59:242:56:006:436:29
6:22
#2927
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi48163303303526(Top 13%)185(Top 2%)185(Top 4%)
10K6.21 mi3.10 mi4655+161307+23307+234525(Top 17%)291(Top 3%)291(Top 6%)
15K9.32 mi3.11 mi4199+456257+50257+503526(Top 13%)185(Top 2%)185(Top 4%)
20K12.43 mi3.11 mi3873+326217+40217+403171(Top 12%)154(Top 1%)154(Top 3%)
Half13.11 mi0.68 mi3817+56209+8209+83143(Top 12%)139(Top 1%)139(Top 3%)
25K15.53 mi2.42 mi3601+216190+19190+192797(Top 11%)122(Top 1%)122(Top 2%)
30K18.64 mi3.11 mi3384+217174+16174+162750(Top 10%)140(Top 1%)140(Top 3%)
20M20.00 mi1.36 mi3283+101168+6168+62741(Top 10%)146(Top 1%)146(Top 3%)
21M21.00 mi1.00 mi3250+331681683136(Top 12%)194(Top 2%)194(Top 4%)
35K21.75 mi0.75 mi3224+261681682890(Top 11%)177(Top 2%)177(Top 4%)
23M23.00 mi1.25 mi3169+55160+8160+83003(Top 11%)199(Top 2%)199(Top 4%)
24M24.00 mi1.00 mi3164+5161-1161-13412(Top 13%)262(Top 2%)262(Top 5%)
40K24.85 mi0.85 mi3071+93159+2159+22066(Top 8%)134(Top 1%)134(Top 3%)
25.2M25.20 mi0.35 mi3029+42156+3156+31837(Top 7%)110(Top 1.0%)110(Top 2%)
Finish26.22 mi1.02 mi2927+102151+5151+51893(Top 7%)125(Top 1%)125(Top 3%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21stories
+97ft-345ft

Overall

3526

Females

185

F18-39

185

5K→10K

3.1 - 6.2 mi

Top 17%
×5stories
+79ft-138ft

Overall

4525

Females

291

F18-39

291

10K→15K

6.2 - 9.3 mi

Top 13%
×3stories
+67ft-78ft

Overall

3526

Females

185

F18-39

185

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3171

Females

154

F18-39

154

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3143

Females

139

F18-39

139

Half→25K

13.1 - 15.5 mi

Top 11%
×4stories
+66ft-88ft

Overall

2797

Females

122

F18-39

122

25K→30K

15.5 - 18.6 mi

Top 10%
×9stories
+181ft-148ft

Overall

2750

Females

140

F18-39

140

30K→20M

18.6 - 20.0 mi

Top 10%
×5stories
+64ft-50ft

Overall

2741

Females

146

F18-39

146

20M→21M

20.0 - 21.0 mi

Top 12%
×8stories
+106ft-24ft

Overall

3136

Females

194

F18-39

194

21M→35K

21.0 - 21.8 mi

Top 11%
×7stories
+17ft-86ft

Overall

2890

Females

177

F18-39

177

35K→23M

21.8 - 23.0 mi

Top 11%
×5stories
+23ft-63ft

Overall

3003

Females

199

F18-39

199

23M→24M

23.0 - 24.0 mi

Top 13%
×6stories
+12ft-82ft

Overall

3412

Females

262

F18-39

262

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2066

Females

134

F18-39

134

40K→25.2M

24.9 - 25.2 mi

Top 7%
×1story
+13ft-16ft

Overall

1837

Females

110

F18-39

110

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

1893

Females

125

F18-39

125

Passing Analysis

Category:
Athletes Passed
2222
Passed By
333
Net Change
+1889
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4816
5K → 10K296135+161#4816#4655
10K → 15K47317+456#4655#4199
15K → 20K3348+326#4199#3873
20K → Half604+56#3873#3817
Half → 25K2226+216#3817#3601
25K → 30K23619+217#3601#3384
30K → 20M11817+101#3384#3283
20M → 21M6128+33#3283#3250
21M → 35K4418+26#3250#3224
35K → 23M8227+55#3224#3169
23M → 24M4338+5#3169#3164
24M → 40K996+93#3164#3071
40K → 25.2M442+42#3071#3029
25.2M → Finish1108+102#3029#2927
TOTALS2222333+1889
📊

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