Boston Marathon logo
BOSTON MARATHON 2023

Michelle Derenski

Bib: 20069•F

TN

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 47%
Gender (Female)
#0 / 11423
Top 30%
Masters (Masters Women)
#0 / 6539
Top 17%
Division (F40-44)
#0 / 1878
Top 32%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:35
Rank: #13366
Start → 5K
24:35 | 7:55/mi
10K· 6.21 mi
48:36
Rank: #12902 (+464)
5K → 10K
24:01 | 7:44/mi
15K· 9.32 mi
1:12:47
Rank: #12771 (+131)
10K → 15K
24:11 | 7:47/mi
20K· 12.43 mi
1:37:32
Rank: #12838 (-67)
15K → 20K
24:45 | 7:58/mi
Half· 13.11 mi
1:42:51
Rank: #12822 (+16)
20K → Half
5:19 | 7:48/mi
25K· 15.53 mi
2:02:13
Rank: #12764 (+58)
Half → 25K
19:22 | 7:59/mi
30K· 18.64 mi
2:27:49
Rank: #12728 (+36)
25K → 30K
25:36 | 8:14/mi
20M
2:39:21
Rank: #12775 (-47)
30K → 20M
11:32 | 8:29/mi
21M
2:48:17
Rank: #12755 (+20)
20M → 21M
8:56 | 8:56/mi
35K· 21.75 mi
2:54:23
Rank: #12776 (-21)
21M → 35K
6:06 | 8:09/mi
23M
3:04:55
Rank: #12754 (+22)
35K → 23M
10:32 | 8:25/mi
24M
3:13:06
Rank: #12732 (+22)
23M → 24M
8:11 | 8:11/mi
40K· 24.85 mi
3:20:16
Rank: #12718 (+14)
24M → 40K
7:10 | 8:23/mi
25.2M
3:23:15
Rank: #12682 (+36)
40K → 25.2M
2:59 | 8:39/mi
Finish· 26.22 mi
3:31:09
Rank: #12589 (+93)
25.2M → Finish
7:54 | 7:45/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
Time1:42:51
Pace7:51 /mi
2nd Half
Distance13.11 mi
Time1:48:18
Pace8:16 /mi
📊Positive Split: 5.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:5824:357:5524:35
7:55
-
10K
6.21 mi11:40:5948:367:4924:01
7:44
-0:11
15K
9.32 mi12:05:101:12:477:4924:11
7:47
+0:03
20K
12.43 mi12:29:551:37:327:5124:45
7:58
+0:11
Half
13.11 mi12:35:141:42:517:515:19
7:48
-0:10
25K
15.53 mi12:54:362:02:137:5219:22
7:59
+0:11
30K
18.64 mi13:20:122:27:497:5625:36
8:14
+0:15
20M
20.00 mi13:31:442:39:217:5811:32
8:29
+0:15
21M
21.00 mi13:40:402:48:178:018:56
8:56
+0:27
35K
21.75 mi13:46:462:54:238:016:06
8:09
-0:47
23M
23.00 mi13:57:183:04:558:0210:32
8:25
+0:16
24M
24.00 mi14:05:293:13:068:038:11
8:11
-0:14
40K
24.85 mi14:12:393:20:168:037:10
8:23
+0:12
25.2M
25.20 mi14:15:383:23:158:042:59
8:39
+0:16
Finish
26.22 mi14:23:323:31:098:047:54
7:45
-0:54

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

7:44 /mi

Average Pace

8:04 /mi

Slowest Pace

8:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:19:14

94% of race

Time at Steady Pace

11:55

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:03 /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 mi11:16:5824:357:5524:35
7:55
#13366
10K
6.21 mi11:40:5948:367:4924:01
7:44
#12902
15K
9.32 mi12:05:101:12:477:4924:11
7:47
#12771
20K
12.43 mi12:29:551:37:327:5124:45
7:58
#12838
Half
13.11 mi12:35:141:42:517:515:19
7:48
#12822
25K
15.53 mi12:54:362:02:137:5219:22
7:59
#12764
30K
18.64 mi13:20:122:27:497:5625:36
8:14
#12728
20M
20.00 mi13:31:442:39:217:5811:32
8:29
#12775
21M
21.00 mi13:40:402:48:178:018:56
8:56
#12755
35K
21.75 mi13:46:462:54:238:016:06
8:09
#12776
23M
23.00 mi13:57:183:04:558:0210:32
8:25
#12754
24M
24.00 mi14:05:293:13:068:038:11
8:11
#12732
40K
24.85 mi14:12:393:20:168:037:10
8:23
#12718
25.2M
25.20 mi14:15:383:23:158:042:59
8:39
#12682
Finish
26.22 mi14:23:323:31:098:047:54
7:45
#12589
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi133663651365112609(Top 47%)3244(Top 28%)3244(Top 173%)
10K6.21 mi3.10 mi12902+4643383+2683383+26812526(Top 47%)3165(Top 28%)3165(Top 169%)
15K9.32 mi3.11 mi12771+1313320+633320+6312609(Top 47%)3244(Top 28%)3244(Top 173%)
20K12.43 mi3.11 mi12838-673386-663386-6613160(Top 49%)3630(Top 32%)3630(Top 193%)
Half13.11 mi0.68 mi12822+163377+93377+912731(Top 48%)3337(Top 29%)3337(Top 178%)
25K15.53 mi2.42 mi12764+583376+13376+112659(Top 48%)3451(Top 30%)3451(Top 184%)
30K18.64 mi3.11 mi12728+363390-143390-1412618(Top 47%)3534(Top 31%)3534(Top 188%)
20M20.00 mi1.36 mi12775-473437-473437-4713556(Top 51%)4145(Top 36%)4145(Top 221%)
21M21.00 mi1.00 mi12755+203445-83445-813043(Top 49%)3964(Top 35%)3964(Top 211%)
35K21.75 mi0.75 mi12776-213473-283473-2813167(Top 49%)4088(Top 36%)4088(Top 218%)
23M23.00 mi1.25 mi12754+223484-113484-1112674(Top 48%)3887(Top 34%)3887(Top 207%)
24M24.00 mi1.00 mi12732+223490-63490-612501(Top 47%)3856(Top 34%)3856(Top 205%)
40K24.85 mi0.85 mi12718+143502-123502-1212602(Top 47%)3994(Top 35%)3994(Top 213%)
25.2M25.20 mi0.35 mi12682+363490+123490+1210538(Top 40%)2964(Top 26%)2964(Top 158%)
Finish26.22 mi1.02 mi12589+933461+293461+2910358(Top 39%)2875(Top 25%)2875(Top 153%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21stories
+97ft-345ft

Overall

12609

Females

3244

F40-44

3244

5K→10K

3.1 - 6.2 mi

Top 47%
×5stories
+79ft-138ft

Overall

12526

Females

3165

F40-44

3165

10K→15K

6.2 - 9.3 mi

Top 47%
×3stories
+67ft-78ft

Overall

12609

Females

3244

F40-44

3244

15K→20K

9.3 - 12.4 mi

Top 49%
×5stories
+106ft-86ft

Overall

13160

Females

3630

F40-44

3630

20K→Half

12.4 - 13.1 mi

Top 48%
×2stories
+19ft-37ft

Overall

12731

Females

3337

F40-44

3337

Half→25K

13.1 - 15.5 mi

Top 48%
×4stories
+66ft-88ft

Overall

12659

Females

3451

F40-44

3451

25K→30K

15.5 - 18.6 mi

Top 47%
×9stories
+181ft-148ft

Overall

12618

Females

3534

F40-44

3534

30K→20M

18.6 - 20.0 mi

Top 51%
×5stories
+64ft-50ft

Overall

13556

Females

4145

F40-44

4145

20M→21M

20.0 - 21.0 mi

Top 49%
×8stories
+106ft-24ft

Overall

13043

Females

3964

F40-44

3964

21M→35K

21.0 - 21.8 mi

Top 49%
×7stories
+17ft-86ft

Overall

13167

Females

4088

F40-44

4088

35K→23M

21.8 - 23.0 mi

Top 48%
×5stories
+23ft-63ft

Overall

12674

Females

3887

F40-44

3887

23M→24M

23.0 - 24.0 mi

Top 47%
×6stories
+12ft-82ft

Overall

12501

Females

3856

F40-44

3856

24M→40K

24.0 - 24.9 mi

Top 47%
×1story
+6ft-20ft

Overall

12602

Females

3994

F40-44

3994

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

10538

Females

2964

F40-44

2964

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2stories
+22ft-21ft

Overall

10358

Females

2875

F40-44

2875

Passing Analysis

Category:
Athletes Passed
2093
Passed By
1316
Net Change
+777
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13366
5K → 10K602138+464#13366#12902
10K → 15K272141+131#12902#12771
15K → 20K162229-67#12771#12838
20K → Half4024+16#12838#12822
Half → 25K164106+58#12822#12764
25K → 30K210174+36#12764#12728
30K → 20M89136-47#12728#12775
20M → 21M10383+20#12775#12755
21M → 35K4566-21#12755#12776
35K → 23M9371+22#12776#12754
23M → 24M7755+22#12754#12732
24M → 40K7258+14#12732#12718
40K → 25.2M459+36#12718#12682
25.2M → Finish11926+93#12682#12589
TOTALS20931316+777
📊

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